Term Name:	4-oxo-L-proline zwitterion
Synonyms:	(2S)-4-oxopyrrolidin-1-ium-2-carboxylate, 4-oxo-L-proline
Definition:	An amino acid zwitterion resulting from a transfer of a proton from the carboxy to the amino group of 4-oxo-L-proline; major species at pH 7.3.
Ontology:	ChEBI [CHEBI:84813]  ( EBI )