Figure 5.

Survival of wild-type and ΔentD mutant cells toward external hydrogen peroxide insult. Cells were grown in liquid culture to the mid-exponential growth phase, and subjected to 0.5 and 1 mM H₂O₂, respectively. Colony forming units per mL were counted and expressed as (N/N0) × 100. Errors bars represent the standard deviation from 6 independent measures. Significant differences (p < 0.05) between wild-type and mutant strains are indicated with asterisks.