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Transmission electron microscopy (TEM) of infected fibroblasts. HF transfected with Towne-BAC (A, C, E) or B4-BAC (B, D, F) were passaged once at 10 dpt and fixed for TEM at 3 days postseeding. The infected cell (A, B), the nucleus (C, D), and the cytoplasm (E, F) are shown. Bars, 5 μm (A, B) or 1 μm (C to F).
