CystathionineCystathionine beta-SynthaseCystathionine gamma-LyaseCysteineCysteine DioxygenaseSulfurMethionineHomocystinuriaSulfur CompoundsHomocysteineCarbon-Oxygen LyasesTaurineGlutathioneHydrogen SulfideS-AdenosylmethionineLyasesCysteine SynthaseDioxygenasesSulfatesHyperhomocysteinemiaCarboxy-LyasesVitamin B 6 DeficiencyBetaine-Homocysteine S-MethyltransferaseAmino Acids, SulfurPyridoxal PhosphateVitamin B 6S-AdenosylhomocysteineFolic AcidGlycine N-MethyltransferaseVitamin B 12MethylationCysteine EndopeptidasesAlkynesHomocystineCystineCysteine ProteasesMethionine AdenosyltransferaseMolecular Sequence DataLiverMethylenetetrahydrofolate Reductase (NADPH2)KineticsAmino Acid Sequence5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseCysteine Proteinase InhibitorsSulfhydryl CompoundsPyridoxineSulfur RadioisotopesVitamin B ComplexSerineBetaineOxidation-ReductionCloning, MolecularHydro-LyasesSulfidesDietDisulfidesSerine O-AcetyltransferaseCarbon IsotopesLipid MetabolismEnergy MetabolismMutationFolic Acid DeficiencyVitamin B 12 DeficiencyHomoserineMethylmalonic AcidEscherichia coliBase SequenceRats, Sprague-DawleyOxidoreductases Acting on CH-NH Group DonorsMutagenesis, Site-DirectedRecombinant ProteinsChromatography, High Pressure LiquidSulfur IsotopesModels, MolecularGlycineAmino AcidsVitamin USequence Homology, Amino AcidBinding SitesProtein Structure, TertiaryCathepsinsCystatins