Essential Biochemistry - Protein Metabolism (Section 8 - No. 49)

Which of the following enzymes is deficient in homocystinuria?

Cystathionine beta-synthase

Homocysteine methyltransferase

Cystathionine gamma-lyase

Phenylalanine hydroxylase

Homocystinuria is primarily caused by a deficiency in cystathionine beta-synthase.