Figure 3

qRT-PCR analyses of omcA and mtrC in WT and ∆ crp cells. Cells were grown in LM with oxygen (white bars) or 10 mM fumarate (light gray bars) as an electron acceptor until the early stationary growth phase. Results are expressed as relative values to mRNA levels in the WT cells grown with oxygen. The error bars represent the standard deviation calculated from at least three measurements. ND, not determined; expression levels under fumarate-reducing conditions were not determined in ∆crp because the cells did not grow under anaerobic conditions.