Quinolinic AcidQuinolinic AcidsKynurenine3-Hydroxyanthranilate 3,4-Dioxygenase3-Hydroxyanthranilic AcidPentosyltransferasesTryptophanTryptophan OxygenaseAmino AcidsNeurotoxinsKynurenine 3-MonooxygenaseNicotinic AcidsHarmineKynurenic AcidSequence Homology, Amino AcidNiacinCorpus StriatumTriosesNADIndoleamine-Pyrrole 2,3,-DioxygenaseAspartic AcidHuntington DiseasePicolinic AcidsAmino Acid SequenceBrainConvulsantsAmino Acid Substitution2-Amino-5-phosphonovalerateDicarboxylic AcidsHydroxyindoleacetic Acid