The molecule is a tetrapeptide composed of one L-cysteine and three L-methionine units joined by peptide linkages. It has a role as a metabolite. It derives from a L-cysteine and a L-methionine.
(2S)-2-[[(2S)-2-[[(2S)-2-[[(2R)-2-amino-3-sulfanylpropanoyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]-4-methylsulfanylbutanoic acid