Quinolinic AcidQuinolinic AcidsKynurenine3-Hydroxyanthranilate 3,4-Dioxygenase3-Hydroxyanthranilic AcidPentosyltransferasesTryptophan OxygenaseTryptophanNerve DegenerationNeurotoxinsKynurenine 3-MonooxygenaseNeurodegenerative DiseasesNicotinic AcidsHarmineKynurenic AcidNiacinBrainHuntington DiseaseCorpus StriatumNeuronsMicrogliaTriosesNADIndoleamine-Pyrrole 2,3,-DioxygenasePicolinic AcidsConvulsants2-Amino-5-phosphonovalerateAspartic AcidKainic Acid