Figure 1: Physiological changes in T. onnurineus NA1 following serial transfers into fresh MM1 medium containing 100% CO.

After 2 (closed circle), 12 (open circle), 32 (closed inverted triangle), 62 (open triangle), 102 (closed square), 122 (open square) and 156 (closed diamond) transfers, (a) cell density (expressed as optical density at 600 nm) was determined at the indicated timepoints. (b) H2 production rates and (c) CO consumption rates were determined during exponential phase. All experiments were conducted independently in duplicate.