MethionineCysteineMethionine Sulfoxide ReductasesMethionine AdenosyltransferaseCysteine EndopeptidasesCysteine Proteases5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseCysteine DioxygenaseAmino Acid SequenceCysteine SynthaseS-AdenosylmethionineMolecular Sequence DataCysteine Proteinase InhibitorsCystineMethionyl AminopeptidasesAmino Acids, SulfurAmino AcidsDisulfidesCystathionineHomocysteineOxidation-ReductionSulfhydryl CompoundsSulfurEscherichia coliKineticsMutagenesis, Site-DirectedBase SequenceMethionine SulfoximineMutationGlutathioneCarbon-Sulfur LyasesBinding SitesAminopeptidasesS-AdenosylhomocysteineEnkephalin, MethionineRecombinant ProteinsModels, MolecularCystathionine beta-SynthaseSequence Homology, Amino AcidVitamin B 12OxidoreductasesCathepsinsCloning, MolecularEthionineProtein ConformationSulfur RadioisotopesElectrophoresis, Polyacrylamide GelMethionine-tRNA LigaseCystatinsCystathionine gamma-LyaseSulfhydryl ReagentsBetaine-Homocysteine S-MethyltransferaseLiverPapainAmino Acid SubstitutionMethylationProtein Structure, TertiarySubstrate SpecificityMolecular WeightCathepsin LLyasesBacterial ProteinsCarbon-Oxygen LyasesStructure-Activity RelationshipThionucleosidesProtein BindingSequence AlignmentCathepsin BFolic AcidSerine O-AcetyltransferaseLeucineTaurineGlycineDithiothreitolChromatography, High Pressure LiquidNorleucineGlycine N-MethyltransferaseMethyltransferasesCatalysisEthylmaleimideSelenomethionineCell LineProtein Processing, Post-TranslationalHistidineSulfenic AcidsIsoleucineSulfur CompoundsHomocystinuriaDithionitrobenzoic AcidProtein BiosynthesisPeptide FragmentsMass SpectrometryHydrogen-Ion ConcentrationPeptidesVitamin UHyperhomocysteinemiaSulfatesThioredoxinsHomocystineCarbon Isotopes