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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. 3.

Fig. 3

(a) Structures of cationic NPs varied with amount of cationic ligands (NP 1-5) and alkyl chain length (NP 6-7) used for transfection of DNA. (b) Transfection of β-Galactosidase using NP-DNA complexes (at 2200:1 ratio), measured by β-gal activity. (c) Transfection efficiency of NPs 2, 6, 7 (2200:1 NP/DNA ratio) and commercially available PEI (60 kDa).