Quinolinic AcidQuinolinic AcidsKynurenine3-Hydroxyanthranilate 3,4-Dioxygenase3-Hydroxyanthranilic AcidNeuronsPentosyltransferasesTryptophan OxygenaseTryptophanNeurotoxinsKynurenine 3-MonooxygenaseNicotinic AcidsHarmineKynurenic AcidNiacinNeurons, AfferentCorpus StriatumTriosesBrainMotor NeuronsNADHuntington DiseaseIndoleamine-Pyrrole 2,3,-DioxygenaseConvulsantsPicolinic Acids2-Amino-5-phosphonovalerateN-MethylaspartateAspartic AcidDicarboxylic AcidsHydroxyindoleacetic Acid