HyperhomocysteinemiaVitamin B 12Folic AcidHomocystineCystathionine beta-SynthaseMethylenetetrahydrofolate Reductase (NADPH2)MethionineVitamin B ComplexVitamin B 6Betaine-Homocysteine S-MethyltransferaseCystathionine5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseS-AdenosylhomocysteineHomocystinuriaOxidoreductases Acting on CH-NH Group DonorsVitamin B 12 DeficiencyFolic Acid DeficiencyMethylmalonic AcidBetaineS-AdenosylmethionineGenes, RegulatorHomocysteine S-MethyltransferasePyridoxineTranscription FactorsMolecular Sequence DataGene Expression Regulation, BacterialCysteine5,10-Methylenetetrahydrofolate Reductase (FADH2)Cystic Fibrosis Transmembrane Conductance RegulatorGlycine N-MethyltransferaseMutationSignal TransductionDietary SupplementsTetrahydrofolatesBacterial ProteinsRisk FactorsAdenosylhomocysteinaseVitamin B DeficiencyTranscobalaminsMethylationVitamin B 6 DeficiencyCells, CulturedGenotypeBase SequenceTranscription, GeneticProtein BindingAmino Acid SequenceRepressor ProteinsBiological MarkersGene Expression RegulationSarcosineCystathionine gamma-LyaseDNA-Binding ProteinsRNA, MessengerPromoter Regions, GeneticPolymorphism, GeneticCell LinePyridoxal PhosphateCardiovascular DiseasesLipotropic AgentsCase-Control StudiesVascular DiseasesEndothelium, VascularMethyltransferasesDietFastingCysteic AcidModels, BiologicalMice, KnockoutMethylenetetrahydrofolate Dehydrogenase (NAD+)Time FactorsTrans-ActivatorsDose-Response Relationship, DrugPhosphatidylethanolamine N-MethyltransferaseRGS ProteinsSulfhydryl CompoundsFluorescence Polarization ImmunoassayPhosphorylationFerredoxin-NADP ReductaseNeural Tube DefectsCholineMice, Inbred C57BLReference ValuesSulfurProtein Structure, TertiaryReverse Transcriptase Polymerase Chain ReactionAmino Acids, SulfurOxidative StressBinding SitesRiboflavinLiverNutritional StatusCell DifferentiationVitaminsGene Expression Regulation, DevelopmentalPhenotypeTubercidinSequence Homology, Amino AcidBlotting, WesternFood, Fortified