Which of the following enzymes is responsible for the degradation of branched-chain amino acids?

A Branched-chain alpha-keto acid dehydrogenase ✓
B Branched-chain aminotransferase
C Phenylalanine hydroxylase
D Tyrosinase

Explanation

Branched-chain alpha-keto acid dehydrogenase is the enzyme responsible for the degradation of branched-chain amino acids, including leucine, isoleucine, and valine.

Source

Harper's Illustrated Biochemistry
Protein Metabolism Biochemistry Amino Acid Catabolism Hard MEDICAL Confidence: high