FIG. 2.

Killing of E. coli by aqueous CuCl₂. Cells of E. coli wild-type strain W3110 were diluted in different CuCl₂ solutions and incubated at 23°C for 1 min. Samples were diluted and plated on LB agar. Surviving cells were counted as CFU after 16 h at 37°C. Shown are averages with standard deviations (error bars) from three independent experiments.