Fig. 1.

Sensitivity of L. lactis TIL46 and the noxE mutant to oxidative stress. (A) Growth curves in GM17 broth at 30°C in the static condition. Shown are the wild-type strain in the absence (▪) and presence (□) of 10 mM paraquat and the noxE mutant in the absence (▴) and presence (▵) of 10 mM paraquat. (B) Survival of exponentially growing cells of the wild-type strain (▪) and the noxE mutant (▴) grown in GM17 broth after exposure to 5 mM H₂O₂ for 30, 60, or 120 min at 30°C. The error bars represent the standard deviations of three independent experiments.