Question

G The first step in the catabolism of amino acids is the removal of the nitrogen as ammonia, forming a keto acid that can enter one of the carbon catabolic pathways. The α‑keto acid pyruvate can be formed from the amino acids alanine, cysteine, glycine, serine, and threonine. Consider the route for alanine catabolism. Alanine reacts with to produce pyruvate and .

This reaction is catalyzed by

A. aspartate aminotransferase.
B. alanine aminotransferase.
C. alanine dehydrogenase.

Answer 1

B. alanine aminotransferase.

Step-by-step explanation:

Ketogenic amino acid contain low carbohydrate and have the keto acid group present in them. Examples of ketogenic amino acid include alanine, cysteine, glycine, serine, and threonine. These amino acids are usually converted to pyruvate.

Alanine aminotransferase helps by catalyzing the transfer of an amino group from alanine to alpha-ketoglutarate in the alanine cycle to form pyruvate and glutamate.