FIG. 4.
Radiation dose response for DNA damage in agarose-embedded normal human fibroblasts. Cells were irradiated as agarose-embedded suspensions after trypsinization, followed by an immediate lysis and processing for the comet assay as described in Materials and Methods. Mean values from 9 slides ± SD are shown. * and ** denote statistically significant effect of irradiation with p < 0.01 and p < 0.001, respectively (ANOVA with post-hoc analysis by Newman-Keuls test).