The two isomeric dipeptides that can be formed from valine and cysteine had to be named with the three-letter shorthand notation and structure has to be drawn. Concept Introduction: Amino acid is a molecule that contains amino functional group and carboxyl functional group. Amino functional group is ( − N H 2 ) and carboxyl functional group is ( − C O O H ) and a R (alkyl) group is considered as side chain, when all these are bonded to same carbon atom. In protein the amide bond ( − C O − N H − ) can link together with two amino acids to form a peptide bond, by the release of water. A dipeptide results from the formation of a peptide bond between the − N H 2 group of the amino acid and the − C O O H group of the second amino acid. The peptide chain are named together with the first three letter of the amino acid joined with a hyphen.

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Chapter 23.10, Problem 23.24P

Interpretation Introduction

Interpretation:

The two isomeric dipeptides that can be formed from valine and cysteine had to be named with the three-letter shorthand notation and structure has to be drawn.

Concept Introduction:

Amino acid is a molecule that contains amino functional group and carboxyl functional group.

Amino functional group is (−NH2) and carboxyl functional group is (−COOH) and a R(alkyl) group is considered as side chain, when all these are bonded to same carbon atom.

In protein the amide bond (−CO−NH− ) can link together with two amino acids to form a peptide bond, by the release of water.

A dipeptide results from the formation of a peptide bond between the −NH2 group of the amino acid and the −COOH group of the second amino acid.

The peptide chain are named together with the first three letter of the amino acid joined with a hyphen.

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