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Agarose gel electrophoresis of various NPs. (a) chitosan/siRNA NPs and HTCC/siRNA NPs with different weight ratios (10:1, 20:1, 30:1 and 40:1) in the presence or absence of TPP. (b) chitosan/siRNA NPs with different weight ratios (60:1, 80:1 and 100:1) in the presence or absence of TPP.
