The molecule is a tetrapeptide composed of L-alanine, L-methionine, L-serine, and L-arginine joined in sequence by peptide linkages. It has a role as a metabolite. It derives from a L-alanine, a L-methionine, a L-serine and a L-arginine.
(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-aminopropanoyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxypropanoyl]amino]-5-(diaminomethylideneamino)pentanoic acid