[{"from": "human", "value": "Provide a brief overview of this molecule. [C][S][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N][C][=Branch1][C][=O][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}, {"from": "gpt", "value": "The molecule is a peptide anion obtained by deprotonation of both carboxy groups and protonation of the glutamyl amino group of gamma-Glu-Met. Major species at pH 7.3. It has a role as a human metabolite. It is a conjugate base of a gamma-Glu-Met."}]