Fig 4.

Growth (A) and H₂ production (B) of wild-type strain (closed symbols) and MC01 mutant (open symbols) in a 3-liter bioreactor with CO supplied at 240 ml min⁻¹ of flow rate. Cell growth was monitored by measuring optical density at 600 nm (OD₆₀₀). The initial CO flow rate of 20 ml min⁻¹ was raised to 240 ml min⁻¹ when the OD₆₀₀ reached about 0.3, as indicated by arrows.