CystathionineCystathionine beta-SynthaseCystathionine gamma-LyaseHomocysteineMethionineCysteineCysteine DioxygenaseSulfurGlycine N-Methyltransferase5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseMethylationHomocystinuriaSulfur CompoundsFolic AcidCarbon-Oxygen LyasesTaurineS-AdenosylmethionineGlutathioneHydrogen SulfideMethylenetetrahydrofolate Reductase (NADPH2)LyasesSerineBetaine-Homocysteine S-MethyltransferaseVitamin B 6 DeficiencyHyperhomocysteinemiaDioxygenasesCysteine SynthaseSulfatesCarboxy-LyasesVitamin B 6S-AdenosylhomocysteinePyridoxal PhosphateVitamin B 12Amino Acids, SulfurFolic Acid DeficiencyBetaineHomocystineAlkynes5,10-Methylenetetrahydrofolate Reductase (FADH2)Oxidoreductases Acting on CH-NH Group DonorsLiverMethionine AdenosyltransferaseCystineTetrahydrofolatesCarbon IsotopesKineticsMolecular Sequence DataPyridoxineGlycine HydroxymethyltransferaseVitamin B ComplexCysteine EndopeptidasesDNA MethylationSulfur RadioisotopesCysteine ProteasesHydro-LyasesAmino AcidsDietEnergy MetabolismLipid MetabolismAmino Acid SequenceSulfidesSulfhydryl CompoundsCloning, MolecularVitamin B 12 DeficiencyHomoserineMethylmalonic AcidSerine O-AcetyltransferaseOxidation-ReductionAzacitidineLeucineDeuteriumCarbonRats, Sprague-DawleyMutationCysteine Proteinase InhibitorsVitamin USulfur IsotopesEscherichia coliGlycineChromatography, High Pressure Liquid