FIGURE 5 

Histograms of event timing along the lytic cascade. Onset time of pR derepression (A), the time at which the activity of pR attains its maximum (B), the onset time of the Q-dependent pR'-tR' expression (C) as well as lysis time (D) in individual cells completing the full lytic cascade after irradiation of lysogens with UV doses of either 5 or 20 J/m². Histograms of cells harboring the pR-GFP or pR'-tR'-GFP plasmids are represented by blue and red bars, respectively. As observations of the expression of these promoters were carried out in different cells, each histogram has been normalized to unit area. Each observation was derived from at least 100 cells.