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(A) Zeta potential and (B) particle size of mPEG-g-PEI/miR-135a with different N/P ratios. (C) Agarose gel electrophoresis of mPEG-g-PEI/miR-135a at different N/P ratios and (D) transmission electron microscopic images of mPEG-g-PEI/miR-135a at an N/P ratio of 6 (bar =500 nm).
Abbreviation: mPEG-g-PEI, polyethylene glycol methyl ether grafted polyethylenimine.
