Constitutively active Stat5 enhances CFU-GM generation in SCF-dependent EML cells.

EML cells were electroporated with different expression vectors including an empty vector, the wild-type Stat 5 (Stat5aWT), or the constitutively active Stat5 (Stat5aHS; 40 μg of each). Six to 8 hours following electroporation the cells were harvested and assayed for CFU-GM as detailed in “Materials and methods.” Results represent the averages and SDs of 4 independent experiments, and for Stat5aHS,P < .01.