Fig. 4From: PM2.5 exposure induced renal injury via the activation of the autophagic pathway in the rat and HK-2 cellTUNEL analysis of rats’ kidney tissues. a Representative images are showing cell apoptosis in renal tissues induced by PM2.5. b Statistical analysis of the proportion of apoptosis cells. Cells with green light presented TUNEL-positive cells, on histogram graphic** indicates statistical difference (p < 0.01), independent-sample t testBack to article page