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Fig. 2 | Biotechnology for Biofuels

Fig. 2

From: Bioenergetic constraints for conversion of syngas to biofuels in acetogenic bacteria

Fig. 2

Bioenergetics of acetate formation from H2 + CO2 in A. woodii. The reducing equivalents for the reductive steps in the WLP are provided by an H2-oxidizing, electron-bifurcating hydrogenase which reduces Fd and NAD+. Excess Fd2− is oxidized by the Rnf complex which reduces NAD+ and builds up a Na+ gradient. This gradient drives ATP synthesis via the Na+-dependent ATP synthase. In total, 0.3 ATP could be synthesized per acetate produced. THF tetrahydrofolate; CoFeS corrinoid–iron-sulfur protein

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