Figure 3

The EGFP protein levels in CHO-S cells determined by flow cytometry. Representative of EGFP fluorescence profile 48 h post-transfection (A) and stable transfection (B). Cells with pIRES-EGFP-2 represented of low EGFP protein level. Cells with pIRES-EGFP-4 and pIRES-EGFP-6, represented of medium EGFP protein level. Cells with pIRES-EGFP-9 represented of high EGFP protein level.