Chapter 21, Problem 88E

Interpretation Introduction

Interpretation: The structures of the given tripeptides are to be drawn. The number of tripeptides possible using the given three amino acids are to be stated.

Concept introduction: When two or more amino acids are linked in a chain, a compound called peptide is formed in which the carboxyl group of each acid is joined to the amino group of the next forming a $\text{-OC-NH-}$ bond, known as peptide bond. A Tripeptide is defined as a peptide consisting of three amino acids which are joined by a peptide bond $\text{-OC-NH-}$. The tripeptide has different orders depending upon the types of amino acids and therefore, each tripeptide is a distinct molecule. Peptide structures are determined by techniques like quantitative hydrolysis, terminal amino acid analysis and partial hydrolysis.

To determine: The structure of the given tripeptide.