A 6-year-old African American girl with speech delay is found to have a large, abnormal peak when blood amino acids are measured

lk2025-05-07  14

题目:A 6-year-old African American girl with speech delay is found to have a large, abnormal peak when blood amino acids are measured. The abnormal amino acid migrates toward the cathode, indicating a positively charged side group in addition to its carboxyl and amino groups. Which of the following amino acids is most probable?

A. Alanine

B. Glycine

C. Histidine

D. Leucine

E. Valine

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