Fig. 2. Delivery of native plasmid DNA (pDNA), and pDNA exposed to ultrasonic shear stress for different time periods to COS7 cells. (a) pDNA; (b) pDNA was complexed with lipofectamine (LA). (c) pDNA was subjected to 10 min ultrasonic shear stress and complexed with LA; (d) pDNA was subjected to 20 min ultrasonic shear stress and complexed with LA; (e) pDNA was subjected to 30 min ultrasonic shear stress and complexed with LA; (f) pDNA was subjected to 40 min ultrasonic shear stress and complexed with LA; scale bar: 100 μm.
