The "signature sequence" shown below represents a portion of a protein from four different organisms. a. At which position(s) are amino acid residues invariant?
b. At which position(s) are amino acids limited to positively charged residues?
c. At which position(s) are amino acids limited to negatively charged residues?
d. At which position(s) are amino acids limited to nonpolar residues?

Question

The "signature sequence" shown below represents a portion of a protein from four different organisms.  a. At which position(s) are amino acid residues invariant?
b. At which position(s) are amino acids limited to positively charged residues?
c. At which position(s) are amino acids limited to negatively charged residues?
d. At which position(s) are amino acids limited to nonpolar residues?

The "Signature Sequence" Shown Below Represents a Portion of a Protein