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Comparison of plaque-forming capabilities. Microscopic images show the GFP expression in cells (LLC-MK2/F7/A) expressing F protein when cultured at 32°C (A and C) and 37°C (B and D) for 6 days after infection with SeV18+/ΔF-GFP (A and B) or SeV18+/MtsHNtsΔF-GFP (C and D).
