Figure 2. Electron micrographs of VP1 virus-like particles for MCPyV, PtvPyV1b, PtvPyV2c, TSPyV and OraPyV1.

VP1 were produced using recombinant baculoviruses. The preparations were applied to carbon-coated grids, negatively stained with 1.5% uranyl acetate and observed at 50,000 nominal magnification with a JEOL 1011 electron microscope (Scale bars, 100 nm).