Term Name:	indoleamine 2,3-dioxygenase activity
Synonyms:	D-tryptophan:oxygen 2,3-oxidoreductase (decyclizing) activity, IDO, tryptophan pyrrolase activity
Definition:	Catalysis of the reaction: tryptophan + O2 = N-formylkynurenine. The product of the reaction depends on the substrate; D-tryptophan produces N-formyl-D-kynurenine, and L-tryptophan produces N-formyl-L-kynurenine.
Ontology:	GO: Molecular Function [GO:0033754]    QuickGO    AmiGO