EGFP expression in ED-7R cells following lentiviral vector transduction. ED-7R cells were transduced at an MOI of 10 by vectors encoding EGFP under the transcriptional control of the indicated promoters and analyzed by FACS 7 days later. EF1α indicates human elongation factor-1-alpha promoter; PGK, human phosphoglycerate kinase promoter; LTR, MoMLV LTR promoter/enhancer; WASP, Wiskott-Aldrich syndrome protein promoter; Jak3, Janus kinase 3 promoter.