For the peptide Ala-His-Glu-Val-Asp-Cys-Lys-Leu, what is the net charge at pH 3?
A) -1
B) 0
C) +1
D) +2
E) +3
Correct Answer:
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Q6: The pKa of the α−carboxyl group of
Q7: Glutamic acid has pKa values of 2.2,
Q8: The amino acid with a side-chain pKa
Q9: What is the pH of a serine
Q10: If the pI of a peptide is
Q12: At which of the following pH values
Q13: All of the amino acids EXCEPT _
Q14: All are true for stereoisomers EXCEPT:
A) A
Q15: All are true statements about L-isoleucine EXCEPT:
A)
Q16: The difference between serine and homoserine is
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