What is the pI of glycine? The structure and pKa values are shown below.

Name: What is the pI of glycine? The structure and pKa values are shown below.
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Question

Quizplus · Accepted Answer

To determine the pI of an amino acid, we need to average the pKa values of the two ionizable groups: the amino group (pKa = 9.6) and the carboxyl group (pKa = 2.3). The average is (9.6 + 2.3)/2 = 5.95, which rounds to 5.97. Therefore, the answer is B.

What Is the PI of Glycine? the Structure and PKa