Figure 1.

The level of DNA damage measured on cells isolated from liver, stomach, and blood of male and female rats exposed to ST-99 as the formation of strand breaks (SBs) by the standard comet assay (a), and oxidative DNA damage as Endo III-sensitive sites (b) and FPG-sensitive sites (c) by the modified comet assay. The levels of DNA strand breaks and oxidized pyrimidines/purines are expressed as % DNA in tail. All values are expressed as mean ± SD. The significant levels observed are * p < 0.05, ** p < 0.01, or *** p< 0.001.