Fig 6. Current generation (A) and expression levels of the genes involved in lactate (B) and other carbon (C) metabolism under potential-controlled conditions.

MR-1(pBBR-glk-galP) cells were cultivated in ECs containing media supplemented with 2 mM glucose as the electron donor. The arrow indicates the time point at which the electrode potential was shifted. Gene expression levels were analyzed by quantitative RT-PCR analysis. Error bars represent standard deviations calculated from at least three measurements. Astarisks indicate statistically significant differences (P < 0.01).