Figure 2From: Key elements of the human bocavirus type 1 (HBoV1) promoter and its trans-activation by NS1 proteinDetection the EGFP expression under control of the HBoV1 promoter (left panel) and of the CMV promoter (middle panel) in different cell lines by fluorescence microscopy. Cells transfected with pGL3-EGFP vectors were used as negative controls. Original magnification 20 ×.Back to article page