1.13.11.11	tryptophan 2,3-dioxygenase	L-tryptophan degradation I (via anthranilate)	-	
1.13.11.52	indoleamine 2,3-dioxygenase	L-tryptophan degradation I (via anthranilate)	-	
3.5.1.9	arylformamidase	L-tryptophan degradation I (via anthranilate)	-	
3.7.1.3	kynureninase	L-tryptophan degradation I (via anthranilate)	-