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Growth of TR339 at 12 (solid bars) or 24 (hatched bars) hours postinfection (MOI, 0.01) of GFP- or candidate gene-expressing Tet-OFF MEFs or mock-treated (parental) or IFN-α/β-treated, untransfected parental cells (1,000 IU for 6 h). Samples titers were determined by standard plaque assay on BHK cells.
