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Figure 2: Acellular assay in TK6 cells. Slides for Comet assay were exposed to each chemical mutagen for 2 h or irradiated with UVC, and then electrophoresis was conducted at p H > 1 3 immediately after exposure to the chemical mutagen or 2 h after UVC irradiation. Reproducibility was ascertained by three independent experiments and representative data are shown. The error bars indicate standard errors of the mean. S ignificant difference from untreated control: 𝑃 < . 0 5 .