art:Arth_1432 K01556 kynureninase [EC:3.7.1.3] | (GenBank) Kynureninase art:Arth_1431 K00453 tryptophan 2,3-dioxygenase [EC:1.13.11.11] | (GenBank) Tryptophan 2,3-dioxygenase apoenzyme / Tryptophan 2,3-dioxygenase holoenzyme