Fig. 3From: Betaine anhydrous in homocystinuria: results from the RoCH registryMean methionine levels in (a) CBS-deficient and (b) MTHFR- and Cbl-deficient patients during the study. Cbl, cobalamin; CBS, cystathionine β-synthase; MTHFR, 5, 10-methylenetetrahydrofolate reductaseBack to article page