Repair kinetics for the TK6 cell line and PBMCs from one individual (#00), whose cells served as an internal control. (A) Baseline damage is indicated as untreated (UT). DNA damage was induced with 100 μM H2O2 at time 0, and then repair was allowed to occur for 15, 30, 60, 90, and 120 minutes in warm media. (B) Background corrected graphs of repair kinetics profiles. Repair rates were estimated by fitting a biphasic exponential decay model to the data. The resulting equations were used to calculate the time it takes to repair 50% of the initial DNA damage (t1/2). Mean and standard error of the mean (SEM) are shown.