Figure 1.

The effects of 10–100 μmol/L PCB 153 on the viability and proliferation of CHO-K1 cells after 6, 24, 48, and 72 h of exposure determined with the Trypan Blue (A), Neutral Red (B), Kenacid Blue (C), and MTT assays (D). Data are presented as mean percentages of control (±SEM). Statistical significance vs control: ^ap<0.001; ^bp<0.005; ^cp<0.01; ^dp<0.025; ^ep<0.05