SMILES: C(CSSCCC(C(=O)[O-])[NH3+])C(C(=O)[O-])[NH3+]
Description: The molecule is dizwitterionic form of homocystine arising from transfer of two protons from the carboxy to the amino groups; major species at pH 7.3. It has a role as a human metabolite. It is a tautomer of a homocystine.