1. Draw the possible ionization states for each of the following amino acids and label each structure (A, B, C, etc.). Indicate the predominant ionization state at pH = 1, 3, pI, 7, 11 (write the letter designation only). a.) arginine Predominant ionization state: pH 1-_; pH 3-___; pI-_; pH 7-_; pH 11- b.) tyrosine Predominant ionization state: pH 1-___; pH 3-_; pI-_; pH 7-; pH 11-_ 2. Draw the structure of the following peptides at the indicated pH and give the name of each. Conventionally, the first residue is the N-terminal amino acid (i.e. it has a free -amino group). a.) the dipeptide Arg-Cys (at pH equal to 7.0) b.) the tripeptide Asp-Val-Asn (at pH equal to 10.0)

1. Draw the possible ionization states for each of the following amino acids and label each structure (A, B, C, etc.). Indicate the predominant ionization state at pH = 1, 3, pI, 7, 11 (write the letter designation only). a.) arginine Predominant ionization state: pH 1-_; pH 3-___; pI-_; pH 7-_; pH 11- b.) tyrosine Predominant ionization state: pH 1-___; pH 3-_; pI-_; pH 7-; pH 11-_ 2. Draw the structure of the following peptides at the indicated pH and give the name of each. Conventionally, the first residue is the N-terminal amino acid (i.e. it has a free -amino group). a.) the dipeptide Arg-Cys (at pH equal to 7.0) b.) the tripeptide Asp-Val-Asn (at pH equal to 10.0)

General, Organic, and Biological Chemistry

7th Edition

ISBN:9781285853918

Author:H. Stephen Stoker

Publisher:H. Stephen Stoker

Chapter20: Proteins

Section: Chapter Questions

Problem 20.58EP: For the tripeptide SerValMet a. What amino acid is located at the peptides N-terminal end? b. What...

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