3-Hydroxyanthranilate 3,4-Dioxygenase3-hydroxyantranilsyraQuinolinic AcidKynureninDioxygenaserortho-AminobenzoatesOxygenaserKynurenin-3-monooxygenasNitrobensoaterTryptofan4-hydroxyfenylpyruvatdioxygenasKatekol-2,3-dioxygenasKarboxilyaserProtokatekuat-3,4-dioxygenasCysteindioxygenasKatekol-1,2-dioxygenasTryptofanoxygenasHomogentisat-1,2-dioxygenasKatekolerPseudomonasBiologisk nedbrytning