Chapter 27: Problem 5
Which of these tripeptides are hydrolyzed by trypsin? by chymotrypsin? (a) Tyr-Gln-Val (b) Thr-Phe-Ser (c) Thr-Ser-Phe
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Deduce the amino acid sequence of an undecapeptide (11 amino acids) from the experimental results shown in the table.
Define the term zwitterion.
Draw a structural formula for the form of each amino most prevalent at \(\mathrm{pH} \mathrm{} 10.0\). (a) Leucine (b) Valine (c) Proline (d) Aspartic acid
In a variation of the Merrifield solid-phase peptide synthesis, the amino group is protected by a fluorenylmethoxycarbonyl (FMOC) group. This protecting group is removed by treatment with a weak base such as the secondary amine piperidine. Write a balanced equation and propose a mechanism for this deprotection.
Many plasma proteins found in an aqueous environment are globular in shape. Which amino acid side chains would you expect to find on the surface of a globular protein and in contact with the aqueous environment? Which would you expect to find inside, shielded from the aqueous environment? Explain. (a) Leu (b) Arg (c) Ser (d) Lys (e) Phe
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