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Draw the structural formula for the predominant form of Asp-Gly-Lys-Ala at physiological pH.

Draw the structural formula for the predominant form of Asp-Gly-Lys-Ala at physiological pH.

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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13.11) Draw the structural formula for the predominant form of Asp-Gly-Lys-Ala at physiological pH. Lone pairs are optional. H L H-N-C | H H :0: || CH₂ C-Ö: || :0: aspartic acid H H :0: | || C-O: H-N-C- 1 H H glycine H L H-N H H :0: :0: || L || c-c-Ö: H-NC-C-O: CH3 H CH₂ T CH₂ T CH₂ CH₂ H-N-H H lysine I H H alanine HINT: Peptides are often identified by listing its amino acid residues' three-letter abbreviations in order from N-terminus to C-terminus. To begin, draw the four amino acids side-by-side (as shown on the right) and then connect them in the same manner that was used for the dipeptide in problem 13.7 Because the structures in your table of amino acids are the predominant forms at physiological pH, if you correctly connect the amino acid structures from the amino acid table, then the peptide that you draw will be the predominant form at physiological pH.
Transcribed Image Text:13.11) Draw the structural formula for the predominant form of Asp-Gly-Lys-Ala at physiological pH. Lone pairs are optional. H L H-N-C | H H :0: || CH₂ C-Ö: || :0: aspartic acid H H :0: | || C-O: H-N-C- 1 H H glycine H L H-N H H :0: :0: || L || c-c-Ö: H-NC-C-O: CH3 H CH₂ T CH₂ T CH₂ CH₂ H-N-H H lysine I H H alanine HINT: Peptides are often identified by listing its amino acid residues' three-letter abbreviations in order from N-terminus to C-terminus. To begin, draw the four amino acids side-by-side (as shown on the right) and then connect them in the same manner that was used for the dipeptide in problem 13.7 Because the structures in your table of amino acids are the predominant forms at physiological pH, if you correctly connect the amino acid structures from the amino acid table, then the peptide that you draw will be the predominant form at physiological pH.
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