Cystathionine beta-SynthaseCystathionine gamma-LyaseHydrogen SulfideCystathionineHomocystinuriaCarbon-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 Errors