Infection of dendritic cells by HPV-16 pseudovirions. DC-1 cells (5 × 104 cells/well) were seeded into 24-well plate the night before infection. The seeded DC-1 cells were then infected with indicated amount of HPV16-GFP pseudoviruses (total amount of L1 protein) for 72 hours and GFP-positive cells were examined by flow cytometry. A. Line graph of percentage of GFP+ cells. B. Representative flow cytometry data of DC-1 cells infected with HPV-16/GFP psV (5 ug of L1 protein).