FIG. 7.
Effect of derepression of PHR1 on the UV survival of Δrad2 strains. Log-phase cells were exposed to 4.5 J of 254-nm radiation per m2 and then to photoreactivating light as described in Materials and Methods. Samples were taken at the indicated times and plated for survival determination. The data points are averages from three independent experiments, and the error bars indicate the standard deviation. Symbols: ■, GBS1867 (RPH1 GIS1); ▴, GBS1869 (Δrph1 GIS1); ▾, GBS1873 (RPH1 Δgis1); ●, GBS1875 (Δrph1 Δgis1).