Figure 1From: Replication interference between human papillomavirus types 16 and 18 mediated by heterologous E1 helicasesExpression of FLAG-tagged E1/E2s of HPV16/18 in C33A cells. C33A cells were transfected with the indicated amounts (ng) of the expression plasmids for E1/E2s of HPV16/18. Two days after transfection, FLAG-tagged E1/E2s in the cell lysates were detected by Western blotting with anti-FLAG antibody. β-actin was detected as loading control.Back to article page