CystathionineCystathionine beta-SynthaseCystathionine gamma-LyaseHomocystinuriaHydrogen SulfideCarbon-Oxygen LyasesHomocysteineMethionineLyasesHyperhomocysteinemiaS-AdenosylmethioninePyridoxal PhosphateCysteineCysteine SynthaseHomocystineSulfurAlkynesHydro-LyasesBetaine-Homocysteine S-MethyltransferasePyridoxineVitamin B 6 DeficiencyHomoserineSulfidesS-AdenosylhomocysteineSerine O-AcetyltransferaseVitamin U5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseSulfur IsotopesReflex, AbdominalBetaineAmino Acids, SulfurVitamin B 6SerineHemeGlycineAmino Acid Metabolism, Inborn ErrorsFolic AcidL-Serine DehydrataseVitamin B 12Molecular Sequence DataLactobacillus helveticusCystineVisceral PainLiverMutationEscherichia coliSulfhydryl CompoundsAmino AcidsSulfurtransferasesKineticsAmino Acid SequenceCloning, MolecularMethylmalonic AcidMethylenetetrahydrofolate Reductase (NADPH2)Folic Acid DeficiencyGlycine N-MethyltransferaseKeto AcidsEthionineGlutathioneLivedo ReticularisGene Expression Regulation, EnzymologicHeterozygoteBase Sequence