FIG. 7.

Effect of cinD inactivation on the sensitivity toward 4-nitroquinoline-N-oxide. L. lactis wild-type (•) and ΔcinD (○) cells were grown in 1-ml cuvettes containing M17 medium supplemented with 0 to 300 μM NQO. Standard deviations calculated from three independent experiments are depicted with error bars. (Inset) Phenotype of ΔcinD under oxidative stress. Filter disks soaked with 25 mM NQO were applied to bacterial lawns of L. lactis wild-type and ΔcinD cells. The plates were incubated overnight at 30°C.