arth:C3B78_06795 K00453 tryptophan 2,3-dioxygenase [EC:1.13.11.11] | (GenBank) kynA; tryptophan 2,3-dioxygenase arth:C3B78_06800 K01556 kynureninase [EC:3.7.1.3] | (GenBank) kynU; kynureninase arth:C3B78_00630 no KO assigned | (GenBank) alpha/beta hydrolase