Fig. 1. The effects of PCBs on ROS generation. ROS production in cerebellar granule cells treated with 0.1% DMSO as a control or 50 μM of PCBs (PCB-126, -169, -114, -157, -52, -4). All values are relative to the control cells (the response of cells with DMSO; 100%). Values represent mean ± SD of three independent experiments.