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A naturally occurring amino acid such as alanine has a group that is a carboxylic acid and a group that is a protonated amine. The p Ka values of the two groups are shown. a. If the p Ka value of a carboxylic acid such as acetic acid is about 5 (see Table 2.1 ), then why is the p Ka value of the carboxylic acid group of alanine so much lower? b. Draw the structure of alanine in a solution at pH=0. c. Draw the structure of alanine in a solution at physiological pH (pH 7.4). d. Draw the structure
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