Figure 4

Characterization of the Cdots@PEI and siRNA-Cdots@PEI complexes. (a) Zeta potential of the Cdots, Cdots@PEI and siRNA-Cdots@PEI complexes. (b) Hydrodynamic diameters and (c) agarose gel electrophoresis analysis of the Cdots and siRNA-Cdots@PEI complexes. There were four paralleled loadings of each example at same time. (d) Cell viability of MGC-803 cells after treatment of different concentrations of Cdots and Cdots@PEI complexes.