Chapter 21, Problem 9A

(a)

Interpretation Introduction

Interpretation: The structure of peptide Ile-Ala-Gly is to be drawn. The peptide bonds and terminal amino and carboxyl groups are to be labeled.

Concept introduction: Peptides are long chain molecules which are formed by making peptide bond between amino acids. The peptide bond is formed by amino and carboxylic group.

Answer to Problem 9A

The structure of peptide Ile-Ala-Gly along with the labeled peptide bond and terminal groups is,

  

Explanation of Solution

Peptide bond is formed when two compounds having amine group and carboxylic group form bond with each other. One peptide bond is formed when two amino acids form bond with each other. The amino group and carboxylic group which do not participate in bond formation and present at terminal carbon atom are labeled as terminal groups. The structure of peptide Ile-Ala-Gly along with the labeled peptide bond and terminal groups is,

  

(b)

Interpretation Introduction

Interpretation: The structure of peptide Gln-Ser is to be drawn. The peptide bonds and terminal amino and carboxyl groups are to be labeled.

Concept introduction: Peptides are long chain molecules which are formed by making peptide bond between amino acids. The peptide bond is formed by amino and carboxylic group.

Answer to Problem 9A

The structure of peptide Gln-Ser along with the labeled peptide bond and terminal groups is,

  

Explanation of Solution

Peptide bond is formed when two compounds having amine group and carboxylic group form bond with each other. One peptide bond is formed when two amino acids form bond with each other. The amino group and carboxylic group which do not participate in bond formation and present at terminal carbon atom are labeled as terminal groups. The structure of peptide Gln-Ser along with the labeled peptide bond and terminal groups is,

  

(c)

Interpretation Introduction

Interpretation: The structure of peptide Ser-Gln is to be drawn. The peptide bonds and terminal amino and carboxyl groups are to be labeled.

Concept introduction: Peptides are long chain molecules which are formed by making peptide bond between amino acids. The peptide bond is formed by amino and carboxylic group.

Answer to Problem 9A

The structure of peptide Ser-Gln along with the labeled peptide bond and terminal groups is,

  

Explanation of Solution

Peptide bond is formed when two compounds having amine group and carboxylic group form bond with each other. One peptide bond is formed when two amino acids form bond with each other. The amino group and carboxylic group which do not participate in bond formation and present at terminal carbon atom are labeled as terminal groups. The structure of peptide Ser-Gln along with the labeled peptide bond and terminal groups is,

  

(d)

Interpretation Introduction

Interpretation: The structure of peptide Cys-Asn-Gly is to be drawn. The peptide bonds and terminal amino and carboxyl groups are to be labeled.

Concept introduction: Peptides are long chain molecules which are formed by making peptide bond between amino acids. The peptide bond is formed by amino and carboxylic group.

Answer to Problem 9A

The structure of peptide Cys-Asn-Gly along with the labeled peptide bond and terminal groups is,

  

Explanation of Solution

Peptide bond is formed when two compounds having amine group and carboxylic group form bond with each other. One peptide bond is formed when two amino acids form bond with each other. The amino group and carboxylic group which do not participate in bond formation and present at terminal carbon atom are labeled as terminal groups. The structure of peptide Cys-Asn-Gly along with the labeled peptide bond and terminal groups is,