1.13.11.1	catechol 1,2-dioxygenase	-	
1.13.11.2	catechol 2,3-dioxygenase	-	
1.13.11.3	protocatechuate 3,4-dioxygenase	-	
1.13.11.4	gentisate 1,2-dioxygenase	-	
1.13.11.5	homogentisate 1,2-dioxygenase	-	
1.13.11.6	3-hydroxyanthranilate 3,4-dioxygenase	-	
1.13.11.8	protocatechuate 4,5-dioxygenase	-	
1.13.11.9	2,5-dihydroxypyridine 5,6-dioxygenase	-	
1.13.11.10	7,8-dihydroxykynurenate 8,8a-dioxygenase	-	
1.13.11.11	tryptophan 2,3-dioxygenase	-