Savia Asked a Question
September 15, 2020 8:59 pmpts 30 pts
Natural proteins are conmposed primarily of 20 d-amino acids. Which one of the following statements is tnue for any of these amino acids in a solution of pH 1.5? (A) Only the amino group is ionized. (B) Only the carboxylic acid group is ionized. (C) Both amino and carboxylic acid groups are ionized. (D) Both amino and carboxylic acid groups are neutral
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  • Abhijeet Gaurav Best Answer
    Answer is (A). Only the Amino group in the form of NH3+ will be in ionized form at pH 1.5. As the COOH loses its H+ at around pH 2. Lowest being of Aspartic acid at pH 1.9 . So ...
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  • Anup padwal
    Option C 1.5 is very low, at this pH Terminas will be protonated as NH3 and C-terminus in COOH+
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