Energetic aspects of CO oxidation in Desulfovibrio desulfuricans

In cell suspension of Desulfovibrio desulfuricans B-1388, oxidation of CO a s the only energy source is associated with reduction of: SO42-. After a 2- h incubation of cells in 8% CO, 81% of the gas is converted. Oxidation of 1 mole CO results in Formation of 0.23 mole H2S. Intracellular ATP content i ncreases from 2.5 (control) to 8.3 nmoles/mg (during CO conversion). Dinitr ophenol inhibits sulfate reduction and CO oxidation. CO dehydrogenase was d etected in cytoplasmic and membrane cell fractions (59 and 34%, respectivel y).