Figure 6.
The presence of nuclear targeting sequences increases gene expression in transfected cells in a cell-specific manner. (a) CV1 cells were arrested in G1 by 24 h pretreatment with 50 μm aphidicolin and transfected with lipofectin. Wells of a 12-well dish received 3 μl of lipofectin complexed with 1 μg of plasmid. Aphidicolin remained present throughout the experiment. Luciferase activities from quadruplicate wells were measured in lysates prepared at 48 h after transfection and normalized to total protein. (b) Differentiated human SMCs were transfected with DEAE-dextran as described in Materials and methods. Luciferase activities from quadruplicate wells were measured as in (a). These results are representative of at least three independent experiments.