[{"from": "human", "value": "Could you provide a description of this molecule? [C][Branch1][#Branch2][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N][S][S][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N]"}, {"from": "gpt", "value": "The molecule is the L-alpha-amino acid anion that is a conjugate base of L-cystine, formed by loss of a proton from each of the carboxy groups. It is the major microspecies at pH > 9.4. It has a role as a human metabolite. It is a conjugate base of a L-cystine."}]