Fig. 12

Luciferase activity analysis (mean ± SD, n = 4) after transfection of HepG2, with pGL-3/PEI 25 kDa, pGL-3/Pluronic-PEI, pGL-3/Pluronic-PEI-DR5, pGL-3/Pluronic-PEI-TAT, or pGL-3/Pluronic-PEI-DR5-TAT at different N/P ratios. *P < 0.05, **P < 0.01