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Chapter 27: Problem 8

What amino acid does each abbreviation stand for? (a) Phe (b) Ser (c) Asp (d) Gln (e) His (f) Gly (g) Tyr

Short Answer

Expert verified
Answer: The full names of the amino acids corresponding to the given abbreviations are: - Phe - Phenylalanine - Ser - Serine - Asp - Aspartic Acid - Gln - Glutamine - His - Histidine - Gly - Glycine - Tyr - Tyrosine

Step by step solution

01

Identify the abbreviation Phe

Phe is the abbreviation for the amino acid Phenylalanine. #b. Ser#
02

Identify the abbreviation Ser

Ser is the abbreviation for the amino acid Serine. #c. Asp#
03

Identify the abbreviation Asp

Asp is the abbreviation for the amino acid Aspartic Acid. #d. Gln#
04

Identify the abbreviation Gln

Gln is the abbreviation for the amino acid Glutamine. #e. His#
05

Identify the abbreviation His

His is the abbreviation for the amino acid Histidine. #f. Gly#
06

Identify the abbreviation Gly

Gly is the abbreviation for the amino acid Glycine. #g. Tyr#
07

Identify the abbreviation Tyr

Tyr is the abbreviation for the amino acid Tyrosine.

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Most popular questions from this chapter

Vitamin K participates in carboxylation of glutamic acid residues of the blood-clotting protein prothrombin. (a) Write a structural formula for \(\gamma\)-carboxyglutamic acid. (b) Account for the fact that the presence of \(\gamma\)-carboxyglutamic acid escaped detection for many years; on routine amino acid analyses, only glutamic acid was detected.

In a variation of the Merrifield solid-phase peptide synthesis, the amino group is protected by a fluorenylmethoxycarbonyl (FMOC) group. This protecting group is removed by treatment with a weak base such as the secondary amine piperidine. Write a balanced equation and propose a mechanism for this deprotection.

Glutathione (G-SH), one of the most common tripeptides in animals, plants, and bacteria, is a scavenger of oxidizing agents. In reacting with oxidizing agents, glutathione is converted to G-S-S-G. (a) Name the amino acids in this tripeptide. (b) What is unusual about the peptide bond formed by the \(N\)-terminal amino acid? (c) Write a balanced half-reaction for the reaction of two molecules of glutathione to form a disulfide bond. Is glutathione a biological oxidizing agent or a biological reducing agent? (d) Write a balanced equation for reaction of glutathione with molecular oxygen, \(\mathrm{O}_{2}\), to form \(\mathrm{G}-\mathrm{S}-\mathrm{S}-\mathrm{G}\) and \(\mathrm{H}_{2} \mathrm{O}\). Is molecular oxygen oxidized or reduced in this process?

Draw a structural formula for the product formed when alanine is treated with the following reagents. (a) CC(C)(C)C(=O)c1ccccc1 (b) O=C1c2ccccc2C(=O)C1(O)O (c) O=C(O)Cc1ccccc1 (d) CC(=O)OC(C)=O (e) Product from (c), L-Alanine ethyl ester, DCC (f) Product from (d), L-Alanine ethyl ester, DCC

Distinguish between intermolecular and intramolecular hydrogen bonding between the backbone groups on polypeptide chains. In what type of secondary structure do you find intermolecular hydrogen bonds? In what type do you find intramolecular hydrogen bonding?
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