Deletion analysis of sequences 5′ to the hEPCR gene in endothelial cells. Constructs containing serial deletions of the 5′ sequence of the hEPCR gene fused to the gene for SEAP (represented schematically on the left of the figure) were transiently transfected into EA.hy926 cells (▪) and HUVECs (▦) as described in “Materials and methods.” The relative normalized reporter activity is shown on the right of the figure, ± standard error.