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. 2012 Apr 11;7(4):e34711. doi: 10.1371/journal.pone.0034711

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Pezzoli et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Hydrodynamic mean diameter (full black circles) and ζ-potential (empty grey rhombi) of chitosan-, copolymer- and 2 kDa branched polyethylenimine (bPEI)-based polyplexes at nitrogen (N) to plasmid DNA phosphate (P) ratio (N/P) 30. Results are expressed as mean ± standard deviation (n≥4).