bul:BW21_3550 K03719 Lrp/AsnC family transcriptional regulator, leucine-responsive regulatory protein | (GenBank) iclR helix-turn-helix domain protein bul:BW21_3116 K00453 tryptophan 2,3-dioxygenase [EC:1.13.11.11] | (GenBank) kynA; tryptophan 2,3-dioxygenase bul:BW21_3115 K01556 kynureninase [EC:3.7.1.3] | (GenBank) kynU; kynureninase