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. 2015 Feb 12;8:20. doi: 10.1186/s13068-015-0204-4

Figure 5.

Figure 5

Overview of metabolic changes in C. thermocellum ΔhydGΔech . When hydrogenases were inactivated (red X), flux to ethanol increased. Further, the alcohol dehydrogenase mutated, allowing use of NADPH as a cofactor for ethanol production (red pathway). Simultaneously, fluxes to H2, lactate, and acetate decreased or were eliminated (gray pathways).