Term Name:	histidine ammonia-lyase activity
Synonyms:	histidase activity, histidinase activity, histidine alpha-deaminase activity, L-histidine ammonia-lyase (urocanate-forming), L-histidine ammonia-lyase activity
Definition:	Catalysis of the reaction: L-histidine = urocanate + NH3.
Ontology:	GO: Molecular Function [GO:0004397]    QuickGO    AmiGO