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Expression of occludin, a tight junction protein, in epithelial cells. (A) Representative western blot and (B) quantification. The western blot analysis indicates that, in group H, the expression of occludin was significantly downregulated in the tight junctions in rats (0.42±0.011 vs. 1.31±0.084; *P<0.01). Group C, control group; group H, high-altitude acute hypoxia group.
