Figure 2: Growth and ROS production.

Black circles: wild type (wt). Red triangles: ΔrpoS. Filled symbols: untreated controls. Open symbols: treatment with 1 μg ml−1 of ampicillin. (a) Growth kinetics were monitored by measuring the optical density at 600 nm. (b) ROS production was measured using fluorescence-activated cell sorting (FACS) and DHR dye. (c) Respiration activity was measured using FACS and CTC dye. For all kinetics, each point represents the mean±s.e.m. of three independent experiments.