Which enzyme is involved in the degradation of homocysteine, an amino acid associated with an increased risk of cardiovascular disease?

A Methionine synthase
B Cystathionine beta-synthase ✓
C Homocysteine methyltransferase
D Betaine homocysteine methyltransferase

Explanation

Cystathionine beta-synthase is an enzyme that catalyzes the conversion of homocysteine to cystathionine, which is then converted to cysteine, thereby reducing homocysteine levels in the blood.

Source

OMIM Database
Enzymes in Disease Biochemistry Amino acid metabolism Hard MEDICAL Confidence: medium