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Chapter 29: Question 29.15 (page 1166)

Name each peptide using both the one-letter and the three-letter abbreviations for the names of the component amino acids.

a.

b.

Short Answer

Expert verified

Answer

a. R-N-V and Arg-Asn-Val

b. K-H-Q and Lys-His-Gln

Step by step solution

01

Peptides

Amino acid binds together by amide bonds. Large molecules are formed called peptides. Peptides are used as dietary supplements, stimulate the skin, and provide proteins required for the skin.

02

Abbreviations

a. The names of these peptides are R-N-V and Arg-Asn-Val.

Structure of Arg-Asn-Val/R-N-V

b. The names of these peptides are K-H-Q and Lys-His-Gln.

Structure of Lys-His-Glu/K-H-Q

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Most popular questions from this chapter

Besides the Boc and Fmoc protecting groups used in peptide synthesis, amines can also be protected by reaction with benzyl chloroformate (C6H5CH2OCOCl). Draw the structure of the product formed by reaction of alanine with benzyl chloroformate

Devise a synthesis of each peptide from amino acid starting materials: (a) Leuโ€“Val; (b) Alaโ€“Ileโ€“Gly.

Write out a stepwise sequence that shows how a racemic mixture of leucine enantiomers can be resolved into optically active amino acids using (R)-ฮฑ-methylbenzylamine.

Question: Identify A and B, isomers of molecular formula \({{\bf{C}}_{\bf{3}}}{{\bf{H}}_{\bf{4}}}{\bf{C}}{{\bf{l}}_{\bf{2}}}\), from the given \({}^{\bf{1}}{\bf{H}}\)NMR data: Compound A exhibits signals at 1.75 (doublet, 3H,\({\bf{J = 6}}{\bf{.9 Hz}}\)) and 5.89 (quartet, \({}^{\bf{1}}{\bf{H}}\),\({\bf{J = 6}}{\bf{.9 Hz}}\)) ppm. Compound B exhibits signals at 4.16 (singlet, 2 H), 5.42 (doublet, \({}^{\bf{1}}{\bf{H}}\),\({\bf{J = 1}}{\bf{.9 Hz}}\)), and 5.59 (doublet, \({}^{\bf{1}}{\bf{H}}\), \({\bf{J = 1}}{\bf{.9 Hz}}\)) ppm.

What alkene is needed to synthesize each amino acid by an enantioselective hydrogenation reaction using and :

(a) Alanine;

(b) Leucine;

(c) Glutamine?
See all solutions

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