AllelesGene FrequencyPhenotypeGenotypeHeterozygotePolymorphism, GeneticHomozygotePolymorphism, Single NucleotideGenetic Predisposition to DiseaseMethylenetetrahydrofolate Reductase (NADPH2)Case-Control StudiesHaplotypesMutationPolymerase Chain ReactionRisk FactorsMolecular Sequence DataGenetic VariationBase SequenceSequence Analysis, DNAPolymorphism, Restriction Fragment LengthChromosome MappingGenetic MarkersModels, GeneticLinkage DisequilibriumCrosses, GeneticAmino Acid SequenceMicrosatellite RepeatsPedigreePhylogenyGenetics, PopulationDNA Mutational AnalysisDNA PrimersGenetic LinkageAsian Continental Ancestry GroupGene DeletionExonsRecombination, GeneticSelection, GeneticPoint MutationMutation, MissenseTime FactorsHLA-DRB1 ChainsGenes, DominantDNAChinaMice, Inbred C57BLGenetic Association StudiesGenetic Complementation TestPromoter Regions, GeneticGenetic LociGenes, LethalGenes, RecessiveGenome-Wide Association StudyEuropean Continental Ancestry GroupQuantitative Trait LociSpecies SpecificityCohort StudiesRNA, MessengerMice, TransgenicMice, KnockoutMinisatellite RepeatsHLA-DQ AntigensCloning, MolecularSuppression, GeneticGenetic TestingGenotyping TechniquesTranscription FactorsEpistasis, GeneticHeterozygote DetectionApolipoprotein E4DNA-Binding ProteinsCells, CulturedHLA-DR AntigensApolipoproteins EMutagenesisEvolution, MolecularReverse Transcriptase Polymerase Chain ReactionMutagenesis, InsertionalSaccharomyces cerevisiaeCell LineDrosophila melanogasterMembrane ProteinsGenes, PlantSequence DeletionBacterial ProteinsJapanGene Expression RegulationGene ExpressionSequence AlignmentAge of OnsetOdds RatioHLA-B AntigensSequence Homology, Amino AcidSignal TransductionIntronsDNA Transposable ElementsEscherichia coliAfrican Continental Ancestry GroupCluster AnalysisMice, Mutant Strains