An elevation of homocysteine and a decrease in cysteine

Last updated: 7/26/2022

An elevation of homocysteine and a decrease in cysteine would most likely be present due to which of the following deficiencies? A) Loss of function of cystathionine-B synthase B) Cobalamin deficiency C) Tetrahydrobiopterin (BH4) deficiency D) Loss of function of methionine synthase