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CH4 production from cell extracts of M. maripaludis strain MM901 grown with either H2 (A) or formate (B). Methane production was stimulated by addition of CoM-S-S-CoB. Controls where CoM-S-S-CoB was excluded are shown (white symbols). Black symbols, CH4 production by cell extracts using H2 as the electron donor. Gray symbols, CH4 production by cell extracts using formate as the electron donor.
