Fig. 2
From: Chromogenic Escherichia coli reporter strain for screening DNA damaging agents
Reporter strain characterization with mitomycin C. A shows different concentrations of mitomycin C applied to the plate using sterile paper disks. Plates show low and high mitomycin C concentrations. In the lower panel, cell viability was assessed by spot assay shown at high and low concentrations of mitomycin C. The control spot contained sterile water. B shows the effect of UV light exposure through a 1 mm slit. Two UV-light intensities were used. The clear area on each experiment indicates cell death. The purple halos indicate reporter strain activation