doi: 10.1128/jb.141.2.694-698.1980.
Origin of hydrogen in methane produced by Methanobacterium thermoautotrophicum
- PMID: 7364716
- PMCID: PMC293677
- DOI: 10.1128/jb.141.2.694-698.1980
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Origin of hydrogen in methane produced by Methanobacterium thermoautotrophicum
J Bacteriol.
1980 Feb.
Abstract
The production of deuterated methane by Methanobacterium thermoautotrophicum in H2O-D2O mixtures was examined by high-resolution mass spectrometry. The hydrogen in the methane arose solely from water and not from hydrogen gas. Hydrogen gas served only as an electron source in methanogenesis. A whole-cell product isotope discrimination of 1.5 favoring hydrogen over deuterium was observed in methane production in 81 atom% deuterated water. The distribution of deuterated methane species is described by a simple model of the overall reaction.
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