FIG. 5.

Effects of ROS quenchers or sucrose on copper surface-mediated killing of E. coli. Cells of E. coli W3110 were treated as described in the legend for Fig. 1 except cells were mixed with ROS quenchers mannitol (horizontally striped bars), Tiron (vertically striped bars), catalase (dark gray bars), or SOD (light gray bars) or sucrose (white bars) or no additive (black bars). All samples were withdrawn after 0, 45, or 60 s. Shown are averages with standard deviations (error bars) from three independent experiments.