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DNase I protection assay. Liposomes containing chitosan/pApoE2 complex was incubated with DNase I enzyme. Lane A, naked pApoE2; lane B, pApoE2 + DNase I; lanes C–H, pApoE2/chitosan complexes loaded in plain, MAN, Pen, PenMAN, RVG, or RVGMAN liposomes, respectively, plus DNase I.
