Term Name:	methionine zwitterion
Synonyms:	2-ammonio-4-(methylsulfanyl)butanoate, 2-azaniumyl-4-(methylsulfanyl)butanoate, methionine
Definition:	An amino acid zwitterion arising from transfer of a proton from the carboxy to the amino group of methionine; major species at pH 7.3.
Ontology:	ChEBI [CHEBI:64558]  ( EBI )