Chapter 24: Q14P (page 1272)
Question: Propose a mechanism for the acid-catalyzed hydrolysis of phenylalanine ethyl ester.
Chapter 24: Q14P (page 1272)
Question: Propose a mechanism for the acid-catalyzed hydrolysis of phenylalanine ethyl ester.
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Get started for freeDraw the structure of the phenylthiohydantoin derivatives of
(a) Alanine (b) Tryptophan (c) Lysine (d) proline
Show how you would use bromination followed by amination to synthesize the following amino acids.
The Sanger method for N-terminus determination is a less common alternative to the Edman degradation. In the Sanger method, the peptide is treated with the Sanger reagent, 2,4-dinitrofluorobenzene, and then hydrolyzed by reaction with 6 M aqueous HCl. The N-terminal amino acid is recovered as its 2,4-dinitrophenyl derivative and identified.
(a)Propose a mechanism for the reaction of the N terminus of the peptide with 2,4-dinitrofluorobenzene.
(b) Explain why the Edman degradation is usually preferred over the Sanger method.
Daw the structure of the predominant form of
Isoleucine at pH 11 (b) Proline at pH 2
Arginine at pH 7 (d) Glutamic acid at pH 7
A mixture of alanine, lysine, and aspartic acid at 1). pH 6 ; 2). pH 11; 3). pH
Draw the electrophoretic separation of Trp, Cys, and His at pH 6.0.
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