Term Name:	topaquinone zwitterion
Synonyms:	2-azaniumyl-3-(4-hydroxy-3,6-dioxocyclohexa-1,4-dien-1-yl)propanoate, topaquinone
Definition:	An amino acid zwitterion arising from transfer of a proton from the carboxy to the amino group of topaquinone; major structure at pH 7.3.
Ontology:	ChEBI [CHEBI:68431]  ( EBI )