The molecule is a tetrapeptide composed of two L-cysteine units joined to two L-histidine units by a peptide linkage. It has a role as a metabolite. It derives from a L-cysteine and a L-histidine.
(2S)-2-[[(2S)-2-[[(2R)-2-[[(2R)-2-amino-3-sulfanylpropanoyl]amino]-3-sulfanylpropanoyl]amino]-3-(1H-imidazol-5-yl)propanoyl]amino]-3-(1H-imidazol-5-yl)propanoic acid