Figure 3: The induced γH2AXfoci in recipient MRC-5 by X-ray irradiated cells. The recipient MRC-5 cells were co-cultured for 30 min with the irradiated monolayer and 3D cultures exposed to 5 Gy X-rays and then fixed. The γH2AXfoci were measured after immunostaining. Error bars represent the standard deviation of three independent experiments. *: P<0.05.