methane formation from h2 and co2 ( 2.5 - 3 mumol x min-1 x mg cells-1 ) by cell suspensions of this organism resulted in the formation of an electrochemical proton potential ( delta mu h + ) across the cytoplasmic membrane of 230 mv ( inside negative ) and in the synthesis of atp up to an intracellular concentration of 5 - 7 nmol/mg .
C0007634
cell
C0007603
cytoplasmic membrane