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. Author manuscript; available in PMC: 2016 Dec 28.
Published in final edited form as: J Control Release. 2015 Nov 10;220(0 0):447–455. doi: 10.1016/j.jconrel.2015.11.005

Figure 3.

Figure 3

Agarose gel electrophoresis retardation assay of PEI derivatives with 0.5 µg pDNA. pDNA only (lane D), weight ratios of polymer/pDNA = 0.25, 0.5, 1 and 2 (lanes 1, 2, 3 and 4, respectively). The negative particles migrated toward the positive electrode under the electric field.