Chapter 29: Q60. (page 1196)
Draw the organic products formed in each reaction.


Short Answer


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Chapter 29: Q60. (page 1196)
Draw the organic products formed in each reaction.




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Draw the structure of the N-phenylthiohydantoin formed by initial Edman degradation of each peptide: (a) Ala-Gly-Phe-Phe; (b) Val-Ile-Tyr.
The fibroin proteins found in silk fibers consist of large regions of β-pleated sheets stacked one on top of another. (a) Explain why having a glycine at every other residue allows the β-pleated sheets to stack on top of each other. (b) Why are silk fibers insoluble in water?
What aldehyde is needed to synthesize each amino acid by the Strecker synthesis?
(a) Valine;
(b) Leucine;
(c) Phenylalanine.
a. 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.
Draw the organic products formed in the following reaction.

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