Chapter 29: Q53. (page 1194)
Name each peptide using both the three-letter and one-letter abbreviations of the component amino acids.
Short Answer
1.Gly-Asp-Glu and G-D-E.
2.Ala-Gly-Arg and A-G-R.
Chapter 29: Q53. (page 1194)
Name each peptide using both the three-letter and one-letter abbreviations of the component amino acids.
1.Gly-Asp-Glu and G-D-E.
2.Ala-Gly-Arg and A-G-R.
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Get started for freea. Draw the structure of the tripeptide A-A-A, and label the two ionizable functional groups.
b. What is the predominant form of A-A-A at pH=1?
c. The values for the two ionizable functional groups (3.39 and 8.03) differ considerably from the values of alanine (2.35 and 9.87;see table 29.1). Account for the observed differences.
Write out the steps for the synthesis of each peptide using the Merrifield method:
(a)Ala-Leu-Phe-Phe;
(b) Phe-Gly-Ala-Ile.
Devise a synthesis of threonine from diethyl acetamidomalonate.
Identify AโE in the following reaction sequence.
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?
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