Figure 2

Photo-induced DSBs. (a) Time-dependence of the percentage of damaged DNA molecules at different DMSO concentrations. (b) The relationship between t 2 and log10 P, where P is the percentage of surviving DNA molecules, which was calculated as [100% − (percentage of damaged DNA)]. (The kinetic constants, K v’s (s−2), are evaluated from the slopes of Fig. 2b. For DMSO’s concentration on 2%, 3% and 5%, the slopes are essentially the same within experimental errors, indicating the presence of saturation effect).