S-AdenosylhomocysteineAdenosylhomocysteinaseMethionineS-AdenosylmethionineMethionine AdenosyltransferaseBetaine-Homocysteine S-MethyltransferaseCystathionine beta-Synthase5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseHomocysteineHomocystinuriaCystathionineGlycine N-MethyltransferaseCystineBetaineAmino Acids, SulfurFormiminoglutamic AcidStreptococcaceaeSulfurFolic Acid DeficiencyFolic AcidLiverLiver Diseases, AlcoholicMethyltransferasesMethionine Sulfoxide ReductasesVitamin B 12HyperhomocysteinemiaEthanolCysteineMethylationGlutathioneEnergy MetabolismLipid MetabolismKineticsOxidation-ReductionMolecular Sequence DataMethionyl AminopeptidasesAmino Acid SequenceMetabolismGlucoseEscherichia coliMutationAmino AcidsChromatography, High Pressure LiquidBase SequenceCarbon IsotopesIntermediate Filament Proteins