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Chapter 24: Q28P. (page 1297)

Draw the complete structure of the following peptide Met-Ser-Gln-NH2

Short Answer

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Complete structure of the peptideMet - Ser - Gln*NH2

Step by step solution

01

Peptides

The amides obtained by the interaction between the amino and carboxylic groups of two or more amino acid molecules are known as peptides. The amide group -CO-NH- in the peptides is known as a peptide linkage.

02

Structure of the given peptide

The peptide bond is formed by the condensation reaction between two amino acids and result in a -CO-NH- bond. The complete structure of the peptide Met - Ser - Gln*NH2 is shown below:

Complete structure of the peptide Met - Ser - Gln*NH2

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Most popular questions from this chapter

Draw the complete structures of the following peptides:

(a) Thr-Phe-Met (b) Serylarginylglycylphenylalanine (c) IMQDK (d) ELVIS

Show how solid-phase peptide synthesis would be used to make Ile-Gly-Asn.

Sometimes chemists need the unnatural D enantiomer of an amino acid, often as part of a drug or an insecticide. Most L-amino acids are isolated from proteins, but the D-amino acids are rarely found in natural proteins. D-amino acids can be synthesized from the corresponding L-amino acids. The following synthetic scheme is one of the possible methods.

(a) Draw the structures of intermediates 1 and 2 in this scheme.

(b) How do we know that the product is entirely the unnatural D configuration?
  1. Show how you would use a Strecker synthesis to make phenylalanine.
  2. Propose a mechanism for each step in the synthesis in part (a).

Question. Propose a mechanism for the coupling of acetic acid and aniline using DCC as a coupling agent.

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