title: Influence of sulfide compounds on the metabolism of Methanobacterium strain AZ.
abstract: Various organic sulfides and inorganic sulfide were studied in respect to their effect on growth and methane production of Methanobacterium strain AZ. In mineral, sulfide-free medium, cysteine regulated the specific rate of methane production (optimum concentration = 5-10(-4) mole/1). A supplement of sulfide (10(-4) mole/1) caused an additional stimulation. Coenzyme M** or glutathione could be substituted for cysteine when sulfide was present. Growth was stimulated by CoM and glutathione to the same extent as with cysteine in sulfide-containing media. The concentration of sulfide in cysteine-containing media affected the excretion of amino acids.
mesh_terms: D000596:Amino Acids / Q000096:biosynthesis; D001419:Bacteria / Q000254:growth & development / Q000378:metabolism*; D003545:Cysteine / Q000378:metabolism; D005978:Glutathione / Q000378:metabolism; D015080:Mesna / Q000378:metabolism; D008697:Methane / Q000096:biosynthesis*; D013440:Sulfides / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D013440:Sulfides; D005978:Glutathione; D003545:Cysteine; D015080:Mesna; D008697:Methane