Term Name:	His-Pro zwitterion
Synonyms:	(2S)-1-[(2S)-2-azaniumyl-3-(1H-imidazol-4-yl)propanoyl]pyrrolidine-2-carboxylate, H-P zwitterion, histidylproline zwitterion, L-His-L-Pro zwitterion
Definition:	A dipeptide zwitterion obtained by transfer of a proton from the carboxy to the amino terminus of His-Pro. Major species at pH 7.3.
Ontology:	ChEBI [CHEBI:147379]  ( EBI )