Fig. 2

Effect of deletion of mstX gene on heavy metal and alkylating agent resistance. a–c Dose–response curves for the C. glutamicum WT, ΔmstX and ΔmstX⁺ strains over 24 h at 30 °C in LB medium containing increasing concentrations of CdCl₂ (a), NiSO₄ (b), and CuSO₄ (c) were recorded. d The growth of the C. glutamicum WT, ΔmstX and ΔmstX⁺ strains after 24 h at 30 °C in LB medium containing CDNB (7.5 mM), IAM (5 mM), and MG (2.5 mM) were recorded. Mean values with standard deviations (error bars) from at least three repeats were shown. **P ≤ 0.01; *P ≤ 0.05