574136.fig.002a
(a)
574136.fig.002b
(b)
574136.fig.002c
(c)
574136.fig.002d
(d)
574136.fig.002e
(e)
574136.fig.002f
(f)
Figure 2: Zeta potential ((a)–(c)) and size ((d)–(f)) at pH 6.4 (filled circle) and pH 7.4 (blank circle) of the polyplexes at various weight ratios. Data are presented as the mean SD ( ).