L-Methionine [R,S]-sulfoximine
L-Methionine [R,S]-sulfoximine is a sulfoximide that inhibits the synthesis of methionine. Methionine is an essential amino acid that is converted to homocysteine and then to cysteine in the body. L-Methionine [R,S]-sulfoximine has been shown to inhibit the conversion of methionine to cysteine in vivo by acting as a competitive inhibitor of methioninase.