Chapter 1, Problem 1.72P

Interpretation Introduction

Interpretation:

Each amino acid in the given tripeptide is to be circled and named.

Concept introduction:

All $\text{α-amino acids}$ have the same basic structure but different side chains. These side chains distinguish the amino acids from one another. When a peptide bond is formed, two amino acids are joined via $\text{O=C-N}$ functional group. The side chain attached to the alpha carbon atom remains intact during the formation of a peptide bond. Thus, the amino acids in the peptide can be identified on the basis of the side chain attached to the alpha carbon atoms.