Figure 1.

(A) Apparent hydrodynamic sizes and (B) zeta potentials of complexes prepared by mixing PEI800, PEI25K, PEI‐DA and PEI‐DA‐TAT with pDNA at different N/P ratios at pH 7.0 and 25°C. For all measurements, the pDNA concentration was fixed at 5 μg/mL. The experimental data are represented as mean ± SE (standard error, n = 3).