TaurineAmino AcidsHyperhomocysteinemiaSequence Homology, Amino AcidVitamin B 12Folic AcidMethionineAmino Acid SequenceAmino Acid SubstitutionHomocystineCystathionine beta-SynthaseMethylenetetrahydrofolate Reductase (NADPH2)Cloning, MolecularVitamin B ComplexVitamin B 6Amino Acids, SulfurBetaine-Homocysteine S-MethyltransferaseAmino Acids, EssentialCystathionine5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseAmino Acid Transport SystemsSequence AlignmentOxidoreductases Acting on CH-NH Group DonorsS-AdenosylhomocysteineBase SequenceMutationCysteineHomocystinuriaEscherichia coliKineticsAmino Acid MotifsBinding SitesVitamin B 12 DeficiencyMolecular Sequence DataCysteic AcidFolic Acid DeficiencyDNA, ComplementaryBetaineMutagenesis, Site-DirectedGlycineRecombinant ProteinsLeucineAmino Acids, AromaticChromatography, High Pressure LiquidS-Adenosylmethioninebeta-AlanineSequence Homology, Nucleic AcidPeptide FragmentsAmino Acids, Branched-ChainMethylmalonic AcidProtein ConformationModels, MolecularStructure-Activity RelationshipSubstrate SpecificityDNAProtein BindingAlanineRNA, MessengerCell LineProtein Structure, TertiaryBiological TransportDietary SupplementsBacterial ProteinsMolecular WeightPyridoxineLiverPeptidesHomocysteine S-MethyltransferaseCarrier ProteinsRestriction MappingSequence Analysis, DNAIsethionic AcidProteinsPhylogenyCattleElectrophoresis, Polyacrylamide GelGenes, BacterialIsoleucine5,10-Methylenetetrahydrofolate Reductase (FADH2)Recombinant Fusion ProteinsDietMembrane Transport ProteinsGlycine N-MethyltransferaseSpecies SpecificityDNA PrimersArgininePlasmidsTetrahydrofolatesLysineAmino Acid Transport Systems, BasicGlutamineProtein Structure, SecondaryExcitatory Amino AcidsCells, CulturedConserved SequenceDose-Response Relationship, DrugGenotypeAmino Acids, BasicDietary ProteinsRisk Factors