MetaCyc Pathway: hydrogen sulfide biosynthesis II (mammalian) in Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868

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Homocysteine desulfhydrase:
L-homocysteine + H2O→hydrogen sulfide + 2-oxobutanoate + ammonium (EC 4.4.1.2)
No genes
Cystathionine gamma-lyase:
L-cysteine + H2O→hydrogen sulfide + ammonium + pyruvate (EC 4.4.1.1; 4.4.1.28)
GFF2044
GFF2055
GFF3120
GFF3204
Cystathionine beta-synthase:
L-cysteine + H2O→hydrogen sulfide + L-serine (EC 4.2.1.22)
No genes
Cystathionine beta-synthase:
2 L-cysteine→hydrogen sulfide + lanthionine (EC 4.2.1.22)
No genes
Cystathionine beta-synthase:
L-cysteine + L-homocysteine→hydrogen sulfide + L-cystathionine (EC 4.2.1.22)
No genes
2 L-homocysteine→hydrogen sulfide + L-homolanthionine
No genes

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Candidate genes for each reaction are identified from best hits to MetaCyc; by matching EC numbers (which are assigned by TIGRFam, SEED, or best hits to KEGG); or by matching SEED roles to KEGG reactions to MetaCyc reactions. See the "Protein" tab of each gene for more information