Chemistry and Biochemistry of Sulfur Natural Compounds: Key Intermediates of Metabolism and Redox Biology

Figure 11

Transsulfuration/transmethylation pathway. Methionine (1), SAM (2), S-adenosylhomocysteine (3), homocysteine (4), cystathionine (5), and cysteine (6). MAT: Met adenosyltransferase; SAH: SAHCy hydrolase; MS: Met synthase; BHMT: betaine:homocysteine methyltransferase; CBS: cystathionine β-synthase; CSE: cystathionine γ-lyase.