Term Name:	homocysteine zwitterion
Synonyms:	2-ammonio-4-sulfanylbutanoate, 2-azaniumyl-4-sulfanylbutanoate
Definition:	An amino acid zwitterion of homocysteine arising from transfer of a proton from the carboxy to the amino group; major species at pH 7.3.
Ontology:	ChEBI [CHEBI:58065]  ( EBI )