Figure 3.

Demonstration of the ability of FdsABG to catalyze both CO₂ reduction and formate oxidation. The reaction was initiated by addition of FdsABG (arrow 1) via an argon-purged Gastight syringe to 200 μm NADH in 100 mm phosphate saturated with CO₂(aq), final pH 6.3. At ∼200 s, 400 μm NAD⁺ was injected into the cuvette (arrow 2), and the reaction was allowed to proceed. At ∼400 s, 40 mm formate was further injected into the cuvette (arrow 3). The reaction was performed at 30 °C under anaerobic conditions.