The enzyme that is deficient in homocysteinuria:
c. Cystathionine synthase(Ref: Nelson's 20/e p 636-642; Ghai 8/e p 653-655)Basic Defect of E.Homocystinuria:Classic Homocystinuria is caused by Cystathionine b-Synthase deficiencyHoocystinuria can also be caused by deficiency of Methylene tetrahydrofolate Reductase & defects in Methylcobalamin formation.
Tyrosinase
Sphingomyelinase
Cystathionine synthase
Acid lipase
Inborn Errors of Metabolism