Fig. 3.

JPV∆TM is defective in promoting cell-to-cell fusion. (A). Luciferase reporter assay for cell fusion was performed in virus-infected Vero cells. (B) F and G protein expression levels in JPV or JPV∆TM virus-infected cells. Vero cells were mock-infected or infected with JPV and JPV∆TM at an MOI of 2. At 2 d.p.i., the cells were collected, and F and G surface or total protein expression levels were determined by flow cytometry. Error bars represent SD. Three independent experiments were performed.