roi:N4261_18155 K00453 tryptophan 2,3-dioxygenase [EC:1.13.11.11] | (GenBank) kynA; tryptophan 2,3-dioxygenase roi:N4261_18150 K01556 kynureninase [EC:3.7.1.3] | (GenBank) kynU; kynureninase