. . . . "tryptophan degradation III (eukaryotic)"^^ . "the kynurenine pathway"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "tryptophan degradation III (eukaryotic)"^^ .