Fig. 7

Comparison of the growth of the mutants in response to lead, zinc, cadmium, and copper in presence of ampicillin for a 5 h and b 10 h. White bar: Wild type; Grey bar: Mutant M1; Black bar: Mutant M2. Metals were used at 50 µM. Ampicillin was used at 100 µg mL⁻¹. Experiments were performed in triplicate, and data represent the averages and standard deviations of the means