Which of the following amino acids would contain the highest concentration of zwitterions at pH 5.90?

Name: Which of the following amino acids would contain the highest concentration of zwitterions at pH 5.90?
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Question

Quizplus · Accepted Answer

At pH 5.90, alanine (pI 6.01) is closest to its isoelectric point (pI), where it exists predominantly in the zwitterionic form. The isoelectric point is the pH at which the amino acid has no net electric charge, maximizing the concentration of zwitterions.

Which of the Following Amino Acids Would Contain the Highest