Figure 7.

Expression of genes from the S.O.S. regulon in E. coli MG1655 lysogenic with λ, λΔexo-xis, Φ24_B, or Φ24_BΔexo-xis, at indicated times after UV irradiation (50 J/m²), as estimated by reverse transcription quantitative real-time PCR. The values obtained with untreated cells were used as calibrators and were subtracted from the values determined at particular time points; thus, the presented values indicate the induction of expression of tested genes. The presented results are mean values from 3 independent experiments (biological samples), with error bars indicating SD.