Figure 1: Transfection of COS-7 cells with DEAE-dextran (sample 1) and DEAE- dextran-MMA graft copolymer. The grafting rate is 130% for samples 2, 3, and 4 at 10 mg/mL, sample 3 at 20 mg/mL, and sample 4 at 28.6 mg/mL.