... .44Purity: ≥98%Appearance: Crystalline solidApplications/Function: S-Adenosyl methionine (SAM, SAMe, SAM-e) is a coenzyme involved ... It is made from adenosine triphosphate (ATP) and methionine by methionine adenosyltransferase (EC 2.5.1.6). Transmethylation, transsulfuration ... the SAM riboswitch, which regulates genes involved in methionine or cysteine biosynthesis.The reactions that produce, consume, ...