Fig. 2.
The percentage of positive transfected cells (transfected Cells%, a), mean fluorescent intensity (MFI, b) and green fluorescence protein expression (c) without serum; relative percentage of transfection efficiency (d) and green fluorescence protein expression in the presence of serum (e) observed by fluorescence microscopy (4×). Data are displayed as mean ± SD (n = 3). *P < 0.05, compared with naked DNA, #P < 0.05, compared with CaP, &P < 0.05, compared with Lipofectamine-2000 (Lip-2000), @P < 0.05, compared with serum free group