Figure 2

The influences of various HPV-2 E2 constructs on the promoter activity under control of the LCR of HPV-2. A. The relative CAT expressions co-transfected with different E2 expressing plasmids in HeLa cells. The schematic structure of HPV-2-LCR cloned in the CAT reporter plasmid pBL-CAT6 is shown above. HPV-2-LCR covers the sequences from nt 6934 to 134. The positions of TATA box and four potential E2 binding sites are indicated with the starting nucleotide (nt) below. HeLa cells were transfected with 2 μg of plasmid pCAT-LCR and 500 ng of either mock plasmid (pcDNA3.1) or the plasmids for various E2 constructs (as indicated). 1 μg pCMV-β-galactosidase was transfected as internal control. Cells were harvested 48 h after transfection. The expressions of CAT and β-galactosidase were determined. The CAT expression each preparation was normalized with its β-galactosidase value. The relative CAT expressions are averaged from at least three independent experiments and presented relative to that of pcDNA3.1. Data are represented as mean ± SEM. B. The relative CAT expressions co-transfected with different E2 expressing plasmids in C33A and SiHa cells. C33A and SiHa cells were transfected with 2 μg of plasmid pCAT-LCR and 500 ng of either mock plasmid (pcDNA3.1) or the plasmids for various E2 constructs (as indicated). 1 μg pCMV-β-galactosidase was transfected as an internal control. The relative CAT expressions are averaged from at least three independent experiments in C33A and SiHa cells and presented relative to that of pcDNA3.1. Data are represented as mean ± SEM