S-adenosyl-L-methionine

S-adenosyl-L-methionine is a sulfonium compound and an S-adenosyl derivative of L-methionine. It serves as an intermediate in methionine metabolism and functions as a coenzyme, nutraceutical, micronutrient, human metabolite, Saccharomyces cerevisiae metabolite, Mycoplasma genitalium metabolite, and cofactor. It is the conjugate acid of S-adenosyl-L-methioninate, an enantiomer of S-adenosyl-D-methionine, and a tautomer of S-adenosyl-L-methionine zwitterion.