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Induction of caffeate respiration during acetogenesis from H2 plus CO2 by cell suspensions of A. woodii. Cell suspensions of A. woodii (1.0 mg protein/ml) grown on fructose were incubated under an H2-CO2 atmosphere at 30°C in a shaking water bath. Caffeate was added from a stock solution. At the times indicated, samples were withdrawn and analyzed to determine the caffeate (▪) and acetate (▴) concentrations as described in Materials and Methods.
