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Chapter 29: 14P (page 1166)

Draw the structure of each peptide. Label the N-terminal and C-terminal amino acids and all amide bonds.

a. Val–Glu

b. Gly–His–Leu

c. M–A–T–T

Short Answer

Expert verified

c.

Step by step solution

01

Peptide

When amino acid binds together by amide bonds, a large molecule is formed called peptide. Peptides are used as dietary supplements, to stimulate skin, and provide proteins required to the skin.

02

N-terminal and C-terminal

N-terminal amino acid are those amino acid which are free from amine group and C-terminal amino acid are those which are free from carboxyl group. N-terminal amino acid is written on the left end of the chain and C-terminal amino acid on the right.

03

Structures

a. The structure of Val-Glu peptide is drawn by joining adjacent and groups in amide bonds.

b. The structure of Gly-His-Leupeptide is drawn by joining adjacent and groups in amide bonds.

c. The structure of M-A-T-T peptide is drawn by joining adjacent and groups in amide bonds.

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Most popular questions from this chapter

Draw the products of each reaction.

(a)

(b)

(c)

(d)

What alkyl halide is needed to synthesize each amino acid from diethyl acetamidomalonate: (a)Asn; (b)His; (c)Trp?

Tryptophan is not classified as a basic amino acid even though it has a heterocycle containing a nitrogen atom. Why is the N atom in the five-membered ring of tryptophan not readily protonated by acid?

Devise a synthesis of each peptide from amino acid starting materials:

(a) Leu–Val; (b) Ala–Ile–Gly.

The enolate derived from diethyl acetamidomalonate is treated with each of the following alkyl halides. After hydrolysis and decarboxylation, what amino acid is formed?

a. CH3I

b. (CH3)2CHCH2Cl

c. CH3CH2CH(CH3)Br
See all solutions

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