Q: Draw the form of the amino acid that is expected to predominate
Draw the form of the amino acid that is expected to predominate at the stated pH. a. Alanine at a pH of 10 b. Proline at a pH of 10 c. Tyrosine at a pH of 9 d. Asparagine at physiological pH e. H...
See AnswerQ: At a pH of 11, arginine is a more effective proton
At a pH of 11, arginine is a more effective proton donor than asparagine. Explain.
See AnswerQ: The OH group on the side chain of serine is not deprotonated
The OH group on the side chain of serine is not deprotonated at a pH of 12. However, the OH group on the side chain of tyrosine is deprotonated at a pH of 12. This can be verified by inspecting the pK...
See AnswerQ: Using the data in Table 25.2, calculate the p
Using the data in Table 25.2, calculate the p of the following amino acids: a. Aspartic acid b. Leucine c. Lysine d. Proline From Table 25.2:
See AnswerQ: For each group of amino acids, identify the amino acid with
For each group of amino acids, identify the amino acid with the lowest pI (try to solve this problem by inspecting their structures, rather than performing calculations). a. Alanine, aspartic acid, o...
See AnswerQ: Identify which two of the 20 naturally occurring amino acids are expected
Identify which two of the 20 naturally occurring amino acids are expected to have the same pI.
See AnswerQ: A mixture containing phenylalanine, tryptophan, and leucine was subjected to
A mixture containing phenylalanine, tryptophan, and leucine was subjected to electrophoresis. Determine which of the amino acids moved the farthest distance assuming that the experiment was performed...
See AnswerQ: Draw the aldehyde that is obtained as a by-product when
Draw the aldehyde that is obtained as a by-product when L-leucine is treated with ninhydrin.
See AnswerQ: The enolate of a ketone can be treated with an ester to
The enolate of a ketone can be treated with an ester to give a diketone. Draw a mechanism for this Claisen-like reaction and explain why an acid source is required after the reaction is complete.
See AnswerQ: Identify the reagents necessary to make each of the following amino acids
Identify the reagents necessary to make each of the following amino acids using a Hell–Volhard–Zelinsky reaction: a. Leucine b. Alanine c. Valine
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