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Deck 26: Biomolecules: Amino Acids,peptides,and Proteins

ملء الشاشة (f)
exit full mode
سؤال
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.Show how leucine might be synthesized using the Knowles enantioselective synthesis.
استخدم زر المسافة أو
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down arrow
لقلب البطاقة.
سؤال
Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

_____ an amino acid in its zwitterionic form.

A)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
B)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
C)
Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
E)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G)
apoenzyme
H) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
I)<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
J) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
K) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) vitamins
سؤال
Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

_____ a carboxyl-protected amino acid.

A)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
B)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
C)
Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
E)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G)
apoenzyme
H) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
I)<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
J) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
K) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) vitamins
سؤال
Exhibit 26-4
Refer to the data below to answer the following question(s):
Porcine dynorphin is a neuropeptide having 17 amino acid residues.Its structure is shown below.
Tyr−Gly−Gly−Phe−Leu−Arg−Arg−Ile−Arg−Pro−Lys−Leu−Lys−Trp−Asp−Asn−Gln
Refer to Exhibit 26-4.Leu5-enkephalin is a pentapeptide contained as the N-terminal sequence of dynorphin.Write the structure of Leu5-enkephalin using both the three letter and one letter abbreviations for the amino acids.
سؤال
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.Draw the structure of the predominant form of leucine at pH = 1.50.
سؤال
Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

_____ an octapeptide with a C-terminal valine.

A)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
B)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
C)
Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
E)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G)
apoenzyme
H) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
I)<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
J) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
K) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) vitamins
سؤال
Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

_____ a polypeptide which gives four fragments on treatment with chymotrypsin.

A)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
B)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
C)
Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
E)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G)
apoenzyme
H) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
I)<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
J) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
K) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) vitamins
سؤال
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.Draw the structure of the predominant form of leucine at pH = 10.00.
سؤال
The most acidic amino acid is ____.
سؤال
Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

_____ the product of an Edman degradation.

A)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
B)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
C)
Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
E)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G)
apoenzyme
H) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
I)<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
J) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
K) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) vitamins
سؤال
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.How many possible stereoisomers of leucine are there?
سؤال
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.Leucine is described as an essential amino acid.What does this mean?
سؤال
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.Draw the condensed structure for leucine,and label all chirality centers with an asterisk.
سؤال
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.Draw a Fischer projection of L-leucine and label the chirality center(s) as R or S.
سؤال
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.Show the alkyl halide you would use to prepare leucine by the amidomalonate method.
سؤال
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.What is the pI of leucine?
سؤال
Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

_____ a peptide coupling reagent.

A)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
B)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
C)
Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
E)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G)
apoenzyme
H) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
I)<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
J) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
K) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) vitamins
سؤال
The most basic amino acid is _____.
سؤال
Define isoelectric point.
سؤال
Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

_____ small organic molecules which act as coenzymes.

A)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
B)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
C)
Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
E)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G)
apoenzyme
H) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
I)<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
J) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
K) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins <div style=padding-top: 35px>
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) vitamins
سؤال
Consider the following titration curve for an amino acid. <strong>Consider the following titration curve for an amino acid. What is the pI of this amino acid?</strong> A)A B)B C)D D)F <div style=padding-top: 35px> What is the pI of this amino acid?

A)A
B)B
C)D
D)F
سؤال
Exhibit 26-4
Refer to the data below to answer the following question(s):
Porcine dynorphin is a neuropeptide having 17 amino acid residues.Its structure is shown below.
Tyr−Gly−Gly−Phe−Leu−Arg−Arg−Ile−Arg−Pro−Lys−Leu−Lys−Trp−Asp−Asn−Gln
Refer to Exhibit 26-4.What fragments would result if dynorphin were cleaved by trypsin?
سؤال
Draw and name the structure of the tripeptide formed from the following amino acids.Use B as the N-terminal acid and A as the C-terminal end.Atoms other than carbon and hydrogen are labeled. Draw and name the structure of the tripeptide formed from the following amino acids.Use B as the N-terminal acid and A as the C-terminal end.Atoms other than carbon and hydrogen are labeled. A B C<div style=padding-top: 35px> Draw and name the structure of the tripeptide formed from the following amino acids.Use B as the N-terminal acid and A as the C-terminal end.Atoms other than carbon and hydrogen are labeled. A B C<div style=padding-top: 35px> Draw and name the structure of the tripeptide formed from the following amino acids.Use B as the N-terminal acid and A as the C-terminal end.Atoms other than carbon and hydrogen are labeled. A B C<div style=padding-top: 35px> A B C
سؤال
What alkyl halide should be used to prepare the following amino acid by the amidomalonate method? Atoms other than carbon and hydrogen are labeled. What alkyl halide should be used to prepare the following amino acid by the amidomalonate method? Atoms other than carbon and hydrogen are labeled. <div style=padding-top: 35px>
سؤال
Exhibit 26-5
Refer to the data below to answer the following question(s):
The octapeptide saralasin is a specific antagonist of angiotensin II.A derivative of saralasin is used therapeutically as an antihypertensive.Amino acid analysis of saralasin show the presence of the following amino acids:
Ala,Arg,His,Pro,Sar,Tyr,Val,Val
Refer to Exhibit 26-5.Sar is the abbreviation for sarcosine,N-methyl aminoethanoic acid.Draw the structure of sarcosine.
سؤال
Consider the following image. <strong>Consider the following image. Which level of protein structure is shown here?</strong> A)Primary B)Secondary C)Tertiary D)Quaternary <div style=padding-top: 35px> Which level of protein structure is shown here?

A)Primary
B)Secondary
C)Tertiary
D)Quaternary
سؤال
The following amino acid: (Atoms other than carbon and hydrogen are labeled. ) <strong>The following amino acid: (Atoms other than carbon and hydrogen are labeled. ) </strong> A)has two chirality centers. B)is classified as secondary α-amino acid. C)is characterized by three pK<sub>a</sub>s D)would have a net +1 charge as shown. <div style=padding-top: 35px>

A)has two chirality centers.
B)is classified as secondary α-amino acid.
C)is characterized by three pKas
D)would have a net +1 charge as shown.
سؤال
Consider the following image. <strong>Consider the following image. Which level of protein structure is shown in the box?</strong> A)Primary B)Secondary C)Tertiary D)Quaternary <div style=padding-top: 35px> Which level of protein structure is shown in the box?

A)Primary
B)Secondary
C)Tertiary
D)Quaternary
سؤال
Show the steps involved in a synthesis of the peptide "F-G-I" using the Merrifield procedure.
سؤال
Exhibit 26-4
Refer to the data below to answer the following question(s):
Porcine dynorphin is a neuropeptide having 17 amino acid residues.Its structure is shown below.
Tyr−Gly−Gly−Phe−Leu−Arg−Arg−Ile−Arg−Pro−Lys−Leu−Lys−Trp−Asp−Asn−Gln
Refer to Exhibit 26-4.What fragments would result if dynorphin were cleaved by chymotropsin?
سؤال
How many different peptides could be produced using one each of the following amino acids? Ala,Gly,His,Cys

A)6
B)16
C)24
D)64
سؤال
Consider the following titration curve for an amino acid. <strong>Consider the following titration curve for an amino acid. At which of the following pH values would the amino acid have a net charge of zero?</strong> A)A B)B C)D D)F <div style=padding-top: 35px> At which of the following "pH" values would the amino acid have a net charge of zero?

A)A
B)B
C)D
D)F
سؤال
Show how you could prepare the following amino acid starting with the appropriate carboxylic acid.Atoms other than carbon and hydrogen are labeled. Show how you could prepare the following amino acid starting with the appropriate carboxylic acid.Atoms other than carbon and hydrogen are labeled. <div style=padding-top: 35px>
سؤال
Classify the following amino acid.Atoms other than carbon and hydrogen are labeled. <strong>Classify the following amino acid.Atoms other than carbon and hydrogen are labeled. </strong> A)acidic B)basic C)neutral <div style=padding-top: 35px>

A)acidic
B)basic
C)neutral
سؤال
Consider the following image. <strong>Consider the following image. Which level of protein structure is shown here?</strong> A)Primary B)Secondary C)Tertiary D)Quaternary <div style=padding-top: 35px> Which level of protein structure is shown here?

A)Primary
B)Secondary
C)Tertiary
D)Quaternary
سؤال
Consider the following data for a hypothetical basic amino acid. pKa
3)15
8)22
10)93
What is the pI of this substance?

A)5.68
B)7.04
C)8.22
D)9.58
سؤال
Consider the following titration curve for an amino acid. <strong>Consider the following titration curve for an amino acid. At which of the following pH values would the amino acid be fully deprotonated?</strong> A)A B)B C)D D)F <div style=padding-top: 35px> At which of the following "pH" values would the amino acid be fully deprotonated?

A)A
B)B
C)D
D)F
سؤال
Exhibit 26-5
Refer to the data below to answer the following question(s):
The octapeptide saralasin is a specific antagonist of angiotensin II.A derivative of saralasin is used therapeutically as an antihypertensive.Amino acid analysis of saralasin show the presence of the following amino acids:
Ala,Arg,His,Pro,Sar,Tyr,Val,Val
Refer to Exhibit 26-5.N-Terminal analysis by the Edman method shows saralasin contains sarcosine at the N-terminus.Partial hydrolysis of saralasin with dilute hydrochloric acid yields the following fragments:
Tyr−Val−His
Sar−Arg−Val
His−Pro−Ala
Val−Tyr−Val
Arg−Val−Tyr
What is the structure of saralasin?
سؤال
Which of the following is a correct representation of the amino acid below? Atoms other than carbon and hydrogen are labeled. <strong>Which of the following is a correct representation of the amino acid below? Atoms other than carbon and hydrogen are labeled. </strong> A)Isoleucine B)ILe C)I D)None of these present this amino acid. E)All of these represent this amino acid. <div style=padding-top: 35px>

A)Isoleucine
B)ILe
C)I
D)None of these present this amino acid.
E)All of these represent this amino acid.
سؤال
On the titration curve for an amino acid.In terms of the letters on the graph,label the isoelectric point,the pKa of the amino group and the pKa of the carboxyl group. On the titration curve for an amino acid.In terms of the letters on the graph,label the isoelectric point,the pK<sub>a</sub> of the amino group and the pK<sub>a</sub> of the carboxyl group. <div style=padding-top: 35px>
سؤال
The enzyme that would catalyze the following reaction ​ <strong>The enzyme that would catalyze the following reaction ​ would belong in which classification?</strong> A)kinase B)oxidase C)protease D)transaminase <div style=padding-top: 35px> would belong in which classification?

A)kinase
B)oxidase
C)protease
D)transaminase
سؤال
Consider the image below. <strong>Consider the image below. What type of interaction is indicated by the arrow?</strong> A)Salt bridges B)Disulfide bonds C)Hydrogen bonds D)Dispersion forces <div style=padding-top: 35px> What type of interaction is indicated by the arrow?

A)Salt bridges
B)Disulfide bonds
C)Hydrogen bonds
D)Dispersion forces
سؤال
The coenzymes NAD+ and FAD are involved in:

A)acyl transfer.
B)methyl transfer.
C)decarboxylation.
D)oxidation/reduction.
سؤال
Which of the following contributes most substantially to rate acceleration produced by an enzyme?

A)Ability to bind the substrate
B)Ability to bind the transition state
C)Ability to bind the product
D)All of the above contribute equally.
سؤال
Which level of protein structure is disrupted upon mild heating or alteration in pH?

A)Primary
B)Secondary
C)Tertiary
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Deck 26: Biomolecules: Amino Acids,peptides,and Proteins
1
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.Show how leucine might be synthesized using the Knowles enantioselective synthesis.
2
Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

_____ an amino acid in its zwitterionic form.

A)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
B)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
C)
Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
E)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G)
apoenzyme
H) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
I)<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
J) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
K) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an amino acid in its zwitterionic form.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) vitamins
3
Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

_____ a carboxyl-protected amino acid.

A)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
B)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
C)
Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
E)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G)
apoenzyme
H) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
I)<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
J) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
K) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a carboxyl-protected amino acid.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) vitamins
4
Exhibit 26-4
Refer to the data below to answer the following question(s):
Porcine dynorphin is a neuropeptide having 17 amino acid residues.Its structure is shown below.
Tyr−Gly−Gly−Phe−Leu−Arg−Arg−Ile−Arg−Pro−Lys−Leu−Lys−Trp−Asp−Asn−Gln
Refer to Exhibit 26-4.Leu5-enkephalin is a pentapeptide contained as the N-terminal sequence of dynorphin.Write the structure of Leu5-enkephalin using both the three letter and one letter abbreviations for the amino acids.
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5
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.Draw the structure of the predominant form of leucine at pH = 1.50.
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6
Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

_____ an octapeptide with a C-terminal valine.

A)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
B)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
C)
Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
E)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G)
apoenzyme
H) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
I)<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
J) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
K) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ an octapeptide with a C-terminal valine.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) vitamins
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7
Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

_____ a polypeptide which gives four fragments on treatment with chymotrypsin.

A)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
B)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
C)
Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
E)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G)
apoenzyme
H) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
I)<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
J) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
K) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a polypeptide which gives four fragments on treatment with chymotrypsin.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) vitamins
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8
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.Draw the structure of the predominant form of leucine at pH = 10.00.
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9
The most acidic amino acid is ____.
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10
Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

_____ the product of an Edman degradation.

A)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
B)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
C)
Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
E)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G)
apoenzyme
H) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
I)<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
J) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
K) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ the product of an Edman degradation.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) vitamins
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11
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.How many possible stereoisomers of leucine are there?
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12
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.Leucine is described as an essential amino acid.What does this mean?
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13
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.Draw the condensed structure for leucine,and label all chirality centers with an asterisk.
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14
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.Draw a Fischer projection of L-leucine and label the chirality center(s) as R or S.
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15
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.Show the alkyl halide you would use to prepare leucine by the amidomalonate method.
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16
Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60.
Refer to Exhibit 26-1.What is the pI of leucine?
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17
Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

_____ a peptide coupling reagent.

A)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
B)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
C)
Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
E)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G)
apoenzyme
H) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
I)<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
J) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
K) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ a peptide coupling reagent.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) vitamins
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18
The most basic amino acid is _____.
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19
Define isoelectric point.
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20
Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

_____ small organic molecules which act as coenzymes.

A)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
B)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
C)
Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
E)
<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G)
apoenzyme
H) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
I)<strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
J) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
K) <strong>Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. _____ small organic molecules which act as coenzymes.</strong> A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) apoenzyme H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) vitamins
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) vitamins
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21
Consider the following titration curve for an amino acid. <strong>Consider the following titration curve for an amino acid. What is the pI of this amino acid?</strong> A)A B)B C)D D)F What is the pI of this amino acid?

A)A
B)B
C)D
D)F
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22
Exhibit 26-4
Refer to the data below to answer the following question(s):
Porcine dynorphin is a neuropeptide having 17 amino acid residues.Its structure is shown below.
Tyr−Gly−Gly−Phe−Leu−Arg−Arg−Ile−Arg−Pro−Lys−Leu−Lys−Trp−Asp−Asn−Gln
Refer to Exhibit 26-4.What fragments would result if dynorphin were cleaved by trypsin?
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23
Draw and name the structure of the tripeptide formed from the following amino acids.Use B as the N-terminal acid and A as the C-terminal end.Atoms other than carbon and hydrogen are labeled. Draw and name the structure of the tripeptide formed from the following amino acids.Use B as the N-terminal acid and A as the C-terminal end.Atoms other than carbon and hydrogen are labeled. A B C Draw and name the structure of the tripeptide formed from the following amino acids.Use B as the N-terminal acid and A as the C-terminal end.Atoms other than carbon and hydrogen are labeled. A B C Draw and name the structure of the tripeptide formed from the following amino acids.Use B as the N-terminal acid and A as the C-terminal end.Atoms other than carbon and hydrogen are labeled. A B C A B C
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24
What alkyl halide should be used to prepare the following amino acid by the amidomalonate method? Atoms other than carbon and hydrogen are labeled. What alkyl halide should be used to prepare the following amino acid by the amidomalonate method? Atoms other than carbon and hydrogen are labeled.
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25
Exhibit 26-5
Refer to the data below to answer the following question(s):
The octapeptide saralasin is a specific antagonist of angiotensin II.A derivative of saralasin is used therapeutically as an antihypertensive.Amino acid analysis of saralasin show the presence of the following amino acids:
Ala,Arg,His,Pro,Sar,Tyr,Val,Val
Refer to Exhibit 26-5.Sar is the abbreviation for sarcosine,N-methyl aminoethanoic acid.Draw the structure of sarcosine.
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26
Consider the following image. <strong>Consider the following image. Which level of protein structure is shown here?</strong> A)Primary B)Secondary C)Tertiary D)Quaternary Which level of protein structure is shown here?

A)Primary
B)Secondary
C)Tertiary
D)Quaternary
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27
The following amino acid: (Atoms other than carbon and hydrogen are labeled. ) <strong>The following amino acid: (Atoms other than carbon and hydrogen are labeled. ) </strong> A)has two chirality centers. B)is classified as secondary α-amino acid. C)is characterized by three pK<sub>a</sub>s D)would have a net +1 charge as shown.

A)has two chirality centers.
B)is classified as secondary α-amino acid.
C)is characterized by three pKas
D)would have a net +1 charge as shown.
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28
Consider the following image. <strong>Consider the following image. Which level of protein structure is shown in the box?</strong> A)Primary B)Secondary C)Tertiary D)Quaternary Which level of protein structure is shown in the box?

A)Primary
B)Secondary
C)Tertiary
D)Quaternary
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29
Show the steps involved in a synthesis of the peptide "F-G-I" using the Merrifield procedure.
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30
Exhibit 26-4
Refer to the data below to answer the following question(s):
Porcine dynorphin is a neuropeptide having 17 amino acid residues.Its structure is shown below.
Tyr−Gly−Gly−Phe−Leu−Arg−Arg−Ile−Arg−Pro−Lys−Leu−Lys−Trp−Asp−Asn−Gln
Refer to Exhibit 26-4.What fragments would result if dynorphin were cleaved by chymotropsin?
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31
How many different peptides could be produced using one each of the following amino acids? Ala,Gly,His,Cys

A)6
B)16
C)24
D)64
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32
Consider the following titration curve for an amino acid. <strong>Consider the following titration curve for an amino acid. At which of the following pH values would the amino acid have a net charge of zero?</strong> A)A B)B C)D D)F At which of the following "pH" values would the amino acid have a net charge of zero?

A)A
B)B
C)D
D)F
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33
Show how you could prepare the following amino acid starting with the appropriate carboxylic acid.Atoms other than carbon and hydrogen are labeled. Show how you could prepare the following amino acid starting with the appropriate carboxylic acid.Atoms other than carbon and hydrogen are labeled.
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34
Classify the following amino acid.Atoms other than carbon and hydrogen are labeled. <strong>Classify the following amino acid.Atoms other than carbon and hydrogen are labeled. </strong> A)acidic B)basic C)neutral

A)acidic
B)basic
C)neutral
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35
Consider the following image. <strong>Consider the following image. Which level of protein structure is shown here?</strong> A)Primary B)Secondary C)Tertiary D)Quaternary Which level of protein structure is shown here?

A)Primary
B)Secondary
C)Tertiary
D)Quaternary
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36
Consider the following data for a hypothetical basic amino acid. pKa
3)15
8)22
10)93
What is the pI of this substance?

A)5.68
B)7.04
C)8.22
D)9.58
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37
Consider the following titration curve for an amino acid. <strong>Consider the following titration curve for an amino acid. At which of the following pH values would the amino acid be fully deprotonated?</strong> A)A B)B C)D D)F At which of the following "pH" values would the amino acid be fully deprotonated?

A)A
B)B
C)D
D)F
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38
Exhibit 26-5
Refer to the data below to answer the following question(s):
The octapeptide saralasin is a specific antagonist of angiotensin II.A derivative of saralasin is used therapeutically as an antihypertensive.Amino acid analysis of saralasin show the presence of the following amino acids:
Ala,Arg,His,Pro,Sar,Tyr,Val,Val
Refer to Exhibit 26-5.N-Terminal analysis by the Edman method shows saralasin contains sarcosine at the N-terminus.Partial hydrolysis of saralasin with dilute hydrochloric acid yields the following fragments:
Tyr−Val−His
Sar−Arg−Val
His−Pro−Ala
Val−Tyr−Val
Arg−Val−Tyr
What is the structure of saralasin?
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39
Which of the following is a correct representation of the amino acid below? Atoms other than carbon and hydrogen are labeled. <strong>Which of the following is a correct representation of the amino acid below? Atoms other than carbon and hydrogen are labeled. </strong> A)Isoleucine B)ILe C)I D)None of these present this amino acid. E)All of these represent this amino acid.

A)Isoleucine
B)ILe
C)I
D)None of these present this amino acid.
E)All of these represent this amino acid.
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40
On the titration curve for an amino acid.In terms of the letters on the graph,label the isoelectric point,the pKa of the amino group and the pKa of the carboxyl group. On the titration curve for an amino acid.In terms of the letters on the graph,label the isoelectric point,the pK<sub>a</sub> of the amino group and the pK<sub>a</sub> of the carboxyl group.
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41
The enzyme that would catalyze the following reaction ​ <strong>The enzyme that would catalyze the following reaction ​ would belong in which classification?</strong> A)kinase B)oxidase C)protease D)transaminase would belong in which classification?

A)kinase
B)oxidase
C)protease
D)transaminase
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42
Consider the image below. <strong>Consider the image below. What type of interaction is indicated by the arrow?</strong> A)Salt bridges B)Disulfide bonds C)Hydrogen bonds D)Dispersion forces What type of interaction is indicated by the arrow?

A)Salt bridges
B)Disulfide bonds
C)Hydrogen bonds
D)Dispersion forces
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43
The coenzymes NAD+ and FAD are involved in:

A)acyl transfer.
B)methyl transfer.
C)decarboxylation.
D)oxidation/reduction.
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44
Which of the following contributes most substantially to rate acceleration produced by an enzyme?

A)Ability to bind the substrate
B)Ability to bind the transition state
C)Ability to bind the product
D)All of the above contribute equally.
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45
Which level of protein structure is disrupted upon mild heating or alteration in pH?

A)Primary
B)Secondary
C)Tertiary
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