Quinolinic AcidQuinolinic AcidsTryptophanKynurenine3-Hydroxyanthranilate 3,4-DioxygenaseTryptophan Oxygenase3-Hydroxyanthranilic AcidPentosyltransferasesKynurenine 3-MonooxygenaseNeurotoxinsNicotinic AcidsHarmineKynurenic AcidNiacinTryptophan SynthaseIndoleamine-Pyrrole 2,3,-DioxygenaseTryptophan HydroxylaseCorpus StriatumTriosesortho-AminobenzoatesNADPicolinic AcidsHydroxyindoleacetic AcidHuntington DiseaseConvulsantsBrain2-Amino-5-phosphonovalerateAspartic Acid