Figure 2
Mutagenic potential of different particle sizes of TiO 2 and C 60 at redBA and gam loci in transgenic MEF cells. 5 × 105 MEF cells were treated with graded doses of either different particle sizes of TiO2 or C60 as described in the text. Results were expressed as the total number of confirmed λ mutants divided by the total number of rescued phages. The average number of preexisting mutants per 106 plaques used for these experiments was 5.69 ± 1.87. Data were pooled from 3 independent experiments. Bars, ± SD. * indicated p < 0.05.