KynurenineKynurenine 3-MonooxygenaseTryptophan3-Hydroxyanthranilate 3,4-DioxygenaseQuinolinic AcidIndoleamine-Pyrrole 2,3,-DioxygenaseTryptophan Oxygenase3-Hydroxyanthranilic AcidKynurenic AcidArylformamidaseXanthurenatesPicolinic Acidsortho-AminobenzoatesPentosyltransferasesMetabolic Networks and PathwaysBiosynthetic PathwaysTryptophan SynthaseTransaminasesTryptophan HydroxylaseHuntington Disease2-Aminoadipate TransaminaseBrainInterferon-gamma