Dynamic expression of UL55 in DEV-infected cells. The kinetics of pUL55 was examined by SDS-PAGE and Western blotting assay. M: Prestained Protein Molecular Weight Marker; Lane 1-7, DEFs infected with DEV were harvested at 8 h, 12 h, 24 h, 36 h, 48 h, 60 h and 72 h post-infection. The lysates of DEV-infected was analyzed by rabbit anti-pUL55 serum. Lane 8, DEFs mock infected with DEV were done in parallel.