CystathionineCystathionine beta-SynthaseCystathionine gamma-LyaseCysteineHomocystinuriaHydrogen SulfideCarbon-Oxygen LyasesHomocysteineMethionineLyasesCysteine SynthaseHyperhomocysteinemiaCysteine EndopeptidasesSulfurS-AdenosylmethioninePyridoxal PhosphateCysteine ProteasesHomocystineAlkynesHydro-LyasesBetaine-Homocysteine S-MethyltransferaseMolecular Sequence DataSulfidesPyridoxineVitamin B 6 DeficiencySerine O-AcetyltransferaseAmino Acid SequenceCysteine DioxygenaseHomoserineCysteine Proteinase InhibitorsS-AdenosylhomocysteineSulfhydryl CompoundsCystineAmino Acids, SulfurSulfur IsotopesVitamin U5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseReflex, AbdominalBetaineMutationKineticsEscherichia coliGlycineGlutathioneDisulfidesVitamin B 6Base SequenceCloning, MolecularHemeAmino AcidsOxidation-ReductionModels, MolecularSerineRecombinant ProteinsFolic AcidVitamin B 12Amino Acid Metabolism, Inborn ErrorsMutagenesis, Site-DirectedProtein Structure, TertiaryL-Serine DehydrataseLiverSulfurtransferasesSequence Homology, Amino AcidBinding SitesLactobacillus helveticusCatalysisCatalytic DomainProtein ConformationVisceral PainTaurineProtein BindingCathepsinsGene Expression Regulation, EnzymologicCystatinsSubstrate SpecificityMethylmalonic AcidMethylenetetrahydrofolate Reductase (NADPH2)Keto AcidsFolic Acid DeficiencyAmino Acid SubstitutionGlycine N-MethyltransferaseCathepsin LHeterozygoteHydrogen-Ion ConcentrationAlaninePapainEnzyme StabilitySequence AlignmentEthionineChromatography, High Pressure LiquidLivedo ReticularisSaccharomyces cerevisiaeSulfhydryl Reagents