Chapter 20, Problem 20.90AP

(a)

Interpretation Introduction

Interpretation: The questions based on the tripeptide are to be answered.

Concept introduction: The human hypothalamus may secret several polypeptides, including the tripeptide.

Amino acid is the compound which comprises amino $\left(-{\text{NH}}_{\text{2}}\right)$ group and carboxyl $\left(-\text{COOH}\right)$ functional group.

The compound glutathione is an essential molecule human body. It acts as an activator for enzymes and protects lipids from oxidation.

All the amino acids are linked by the peptide linkage. It is an amide which is formed between $-\text{COOH}$ group and $-{\text{NH}}_{\text{2}}$ group.

To determine: The structure of the three amino acids that combine to make the tripeptide.

(b)

Interpretation Introduction

To determine: If any of the constituent amino acids are among the $20-\alpha$ amino acids in the proteins.