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Growth (A) and H2 production (B) of the wild-type strain T. onnurineus NA1 (circles) and the ΔCorQ/corQR↑ (squares) and ΔCorR/corQR↑ (triangles) mutants in a 3-liter bioreactor with CO supplied continuously. Each experiment was performed one time. Cell growth was monitored by measuring the OD600. The initial CO flow rate of 20 ml min−1 was raised to 400 ml min−1 when the OD600 reached about 0.3, as indicated by arrows.
