Comparison of the promoter activities of pGL3/−1413 and its deletion constructs in Dami, HEL, K562, and HL60 cells. On the left is a schematic diagram of the GPV promoter/luciferase constructs (see Fig 8). On the right are the luciferase activities of the constructs after transfection into Dami, HEL, K562, and HL60 cells. Cotransfection with a sea pansy/luciferase construct was used to normalize for transfection efficiency, and points are each the mean ± SEM of at least 3 experiments.