Quinolinic AcidQuinolinic AcidsKynurenine3-Hydroxyanthranilate 3,4-Dioxygenase3-Hydroxyanthranilic AcidNeurodegenerative DiseasesPentosyltransferasesTryptophan OxygenaseTryptophanNeurotoxinsKynurenine 3-MonooxygenaseNicotinic AcidsHarmineKynurenic AcidNiacinHuntington DiseaseBrainCorpus StriatumTriosesNADIndoleamine-Pyrrole 2,3,-DioxygenaseNeuronsPicolinic AcidsMicrogliaConvulsants2-Amino-5-phosphonovalerateAspartic Acid