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Electron micrographs of HeLa cells expressing PV nonstructural proteins. Cell cultures were infected with vTF7-3 and transfected with plasmid pPVΔP1 (a and d), pE5PVΔP1 (b and e), or pPVΔP1-3D∗(c and f). (g) PV-infected cell. The morphologies of cells (a to c) and of individual vesicles (d to g) appeared similar in all panels. Bars: 200 (a to c) and 500 (d to g) nm.
