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Down regulation of R1 protein expression in HeLa cells and A549 cells treated with Lp-PEI/LOR, Lp-PP/LOR, and Lp-PPRP/LOR. (A, C) HeLa cells. (B, D) A549 cells. *p < .05 vs. Lp-PEI/LOR, **p < .01 vs. Lp-PEI/LOR, #p < .05 vs. Lp-PP/LOR, and ##p < .01 vs. Lp-PP/LOR.
