Representative RAPD fingerprints showing genotoxicity at the DNA sequence level in long-term FA-treated Caki-1 cells. RAPD-PCR fingerprints were generated by using primer OPK-17 (lanes 2–9) and OPK-19 (lanes 10–17). Samples in each lane are as follows: lane 1, DNA size marker; lanes 2 and 10, control; lanes 3 and 11, control + NAC; lanes 4 and 12, LT-FA 100 μM; lanes 5 and 13, LT-FA 100 μM + NAC; lanes 6 and 14, LT-FA 200 μM; lanes 7 and 15, LT-FA 200 μM + NAC; lanes 8 and 16, LT-FA 400 μM; and lanes 9 and 17, LT-FA 400 μM + NAC.