CystathionineCystathionine beta-SynthaseCystathionine gamma-LyaseHomocystinuriaHydrogen SulfideAmino AcidsLyasesCarbon-Oxygen LyasesSequence Homology, Amino AcidMethionineATP Citrate (pro-S)-LyaseAmino Acid SequenceHomocysteineCloning, MolecularAmino Acid SubstitutionCysteineHyperhomocysteinemiaMolecular Sequence DataPyridoxal PhosphateS-AdenosylmethionineBase SequenceCysteine SynthaseEscherichia coliSulfurMutationPolysaccharide-LyasesKineticsHydro-LyasesAmino Acids, SulfurAdenylosuccinate LyaseHomocystineAlkynesOxo-Acid-LyasesSequence AlignmentRecombinant ProteinsAmino Acids, EssentialBetaine-Homocysteine S-MethyltransferaseBinding SitesAmino Acid Transport SystemsPyridoxineModels, MolecularVitamin B 6 DeficiencySulfidesAldehyde-LyasesMutagenesis, Site-DirectedHomoserineGlycineProtein Structure, TertiarySubstrate SpecificityProtein ConformationAmino Acid MotifsProtein BindingDNA, ComplementarySequence Homology, Nucleic AcidSerine O-AcetyltransferaseSerineS-AdenosylhomocysteineRNA, MessengerMolecular WeightBacterial ProteinsLiverDNACell LineStructure-Activity RelationshipPeptide FragmentsSulfur IsotopesElectrophoresis, Polyacrylamide GelAlanineVitamin UAmino Acids, AromaticDNA PrimersSequence Analysis, DNAAmino Acid Metabolism, Inborn ErrorsAmino Acids, Branched-ChainRecombinant Fusion ProteinsLeucineSpecies SpecificityChromatography, High Pressure LiquidRestriction MappingCatalysis5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseBetaineCystineSaccharomyces cerevisiaeGenes, BacterialReflex, AbdominalPeptidesConserved SequenceLysineHemeGamma RaysMacromolecular SubstancesPolymerase Chain ReactionVitamin B 6PhylogenyPlasmidsCatalytic DomainGenetic Complementation TestGene ExpressionProteins