Fig. 4. Transfection efficiency of the various CDs described in this work as a function of CD/pDNA w/w ratio (from 0.5 to 32). bPEI25k and bPEI600 were introduced for comparison. A549 cells were treated as described in the Experimental section and transfection rate was determined after 24 h incubation. C stands for control untreated cells. Data shown are representative of triplicate determinations (mean ± SD).
