The structure of the peptide Asp − Cys − Gly − Tyr needs to be determined with the one-letter abbreviations. Concept Introduction: Peptides are polymers of amino acids which are organic molecule with −NH2 and −COOH groups bonded on same C-atom. Each amino acid is bonded wither other through peptide bond. The peptide bond is formed by condensation reaction of −NH2 and −COOH groups that leads to the formation of an amide linkage.

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Chapter 18.4, Problem 44PP

(a)

Interpretation Introduction

Interpretation:The structure of the peptide Asp−Cys−Gly−Tyr needs to be determined with the one-letter abbreviations.

Concept Introduction: Peptides are polymers of amino acids which are organic molecule with −NH2 and −COOH groups bonded on same C-atom. Each amino acid is bonded wither other through peptide bond. The peptide bond is formed by condensation reaction of −NH2 and −COOH groups that leads to the formation of an amide linkage.

(b)

Interpretation Introduction

Interpretation: The structure of the peptide Asn−Tyr−Asp−Glu-Tyr needs to be determined with the one-letter abbreviations.

Concept Introduction: Peptides are polymers of amino acids which are organic molecule with −NH2 and −COOH groups bonded on same C-atom. Each amino acid is bonded wither other through peptide bond. The peptide bond is formed by condensation reaction of −NH2 and −COOH groups that leads to the formation of an amide linkage.

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