Chapter 21.4, Problem 21.4P

Interpretation Introduction

(a)

Interpretation:

The N-terminal amino acid in the tetrapeptide alanylglyclleucylmethionine should be identified.

Concept Introduction:

The amino acid residue with free $\text{α}$ -amino group $\left(-{\text{NH}}_{\text{3}}{}^{+}\right)$ is known as N-terminal amino acid and residue at the other end having free $\text{α}$ -carboxyl group $\left(-{\text{COO}}^{-}\right)$ is known as C-terminal amino acid.

Interpretation Introduction

(b)

Interpretation:

The C-terminal amino acid in the tetrapeptide alanylglyclleucylmethionine should be identified.

Concept Introduction:

The amino acid residue with free $\text{α}$ -amino group $\left(-{\text{NH}}_{\text{3}}{}^{+}\right)$ is known as N-terminal amino acid and residue at the other end having free $\text{α}$ -carboxyl group $\left(-{\text{COO}}^{-}\right)$ is known as C-terminal amino acid.

Interpretation Introduction

(c)

Interpretation:

The peptide should be written using three-letter symbols for the amino acids.

Concept Introduction:

An amine or peptide bond is a chemical bond. It is formed when amino groups of one molecule is reacts with carboxylic group of other molecule. Derivation of two amino acids is known as dipeptide.