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. Author manuscript; available in PMC: 2013 Feb 1.
Published in final edited form as: Adv Drug Deliv Rev. 2011 Sep 6;64(2):200–216. doi: 10.1016/j.addr.2011.08.006

Fig. 6.

Fig. 6

(a) Schematic representation of the complexation between cationic NP and anionic protein (β-Gal), leading to efficient permeation through the cell membrane compared to the uncomplexed protein. (b) Structures of the cationic NPs and the surface ligands.