Fig. 3
From: Chromogenic Escherichia coli reporter strain for screening DNA damaging agents
Reporter strain specificity test. A shows the effect of osmotic, membrane, oxidative, and protein stress (clockwise) using NaCl, SDS, H2O2, and ethanol as the corresponding perturbing agents at the indicated concentration. B shows the effect of different concentrations of H2O2. i shows the effect of H2O2 without iron in the media, lower panel shows the transitory activation of the reporter strain after a 30-min exposure to different concentrations of H2O2. ii shows the effect of two concentrations of iron in the media and the effect of exposure to H2O2 at different concentrations emulating a Fenton reaction. The iron present in the media is indicated at the bottom of each image. The clear area on each experiment indicates cell death. The purple halos indicate reporter strain activation