Term Name:	Pro-Ala zwitterion
Synonyms:	(2S)-2-{[(2S)-pyrrolidin-1-ium-2-carbonyl]amino}propanoate, L-Pro-L-Ala zwitterion, L-prolyl-L-alanine zwitterion, PA zwitterion, prolylalanine zwitterion
Definition:	A dipeptide zwitterion obtained by transfer of a proton from the carboxy to the amino terminus of Pro-Ala. Major species at pH 7.3.
Ontology:	ChEBI [CHEBI:133659]  ( EBI )