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Chapter 29: Q53. (page 1194)

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

Short Answer

Expert verified

1.Gly-Asp-Glu and G-D-E.

2.Ala-Gly-Arg and A-G-R.

Step by step solution

01

Amino Acids

Amino acids containan amino group and carboxylate anion in their structure. When they bond together, it results in the formation of proteins.Peptides are formed by connecting amino acids with peptide bonds.

02

Naming of the peptide using three-letter and one-letter abbreviations

1.The three-letter word for this peptide is Gly-Asp-Glu, and the one-letter word is G-D-E.


1.The three-letter word for this peptide is Ala-Gly-Arg, and the one-letter word is A-G-R.


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Most popular questions from this chapter

(a) What products are formed when each peptide is treated with trypsin? (b) What products are formed when each peptide is treated with chymotrypsin?

[1] Gly鈥揂la鈥揚he鈥揕eu鈥揕ys鈥揂la

[2] Phe鈥揟yr鈥揋ly鈥揅ys鈥揂rg鈥揝er

[3] Thr鈥揚ro鈥揕ys鈥揋lu鈥揌is鈥揋ly鈥揚he鈥揅ys鈥揟rp鈥揤al鈥揤al鈥揚he

Give the amino acid sequence of each peptide using the fragments obtained by partial hydrolysis of the peptide with acid.

  1. A tetrapeptide that contains Ala, Gly, His, and Tyr, which is hydrolyzed to the dipeptides His-Tyr, Gly-Ala, and Ala-His.
  2. A pentapeptide that contains Glu, Gly, His, Lys, and Phe, which is hydrolyzed to His-Gly-Glu, Gly-Glu-Phe, and Lys-His.

Which of the following amino acids are typically found in the interior of a globular protein, and which are typically found on the surface: (a)phenylalanine; (b)aspartic acid; (c) lysine; (d) isoleucine; (e) arginine; (f) glutamic acid?

Outline the steps needed to synthesize the tetrapeptideAla鈥揕eu鈥揑le鈥揋ly using the Merrifield technique.

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