FIG. 2.

Effects of inactivating the rnr gene on the levels of selected mRNAs. Strains KT2440 (wild type) or KTRNR1 (an rnr derivative of KT2440) were cultivated in LB medium at 30°C. At a turbidity of 0.6, aliquots were taken and processed to obtain total RNA. The amounts of the mRNAs corresponding to the indicated genes were measured by real-time RT-PCR. The values indicate the ratios of the mRNA levels observed for strain KTRNR1 relative to those of the wild-type strain and correspond to the average of three independent assays; the standard error is shown.