has role is conjugate base of homocysteine alpha-amino-acid anion homocysteinate -1 134.028 134.17700 2-amino-4-sulfanylbutanoate An alpha-amino acid anion that is the conjugate base of homocysteine, obtained by deprotonation of the carboxy group. C4H8NO2S CHEBI:66952 FFFHZYDWPBMWHY-UHFFFAOYSA-M InChI=1S/C4H9NO2S/c5-3(1-2-8)4(6)7/h3,8H,1-2,5H2,(H,6,7)/p-1 NC(CCS)C([O-])=O chebi_ontology fundamental metabolite