Solved: Consider the fully protonated amino acid valine:
Chapter 25, Problem 25.48(choose chapter or problem)
Consider the fully protonated amino acid valine: CH3 NH3 CH3 H H C C COOH 9.62 2.32 where the numbers denote the pKa values. (a) Which of the two groups (N 1 H3 or COOH) is more acidic? (b) Calculate the predominant form of valine at pH 1.0, 7.0, and 12.0. (c) Calculate the isoelectric point of valine. (Hint: See 16.137.)
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