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Derepression of d109 by TSA and d105 in Vero cells. Monolayers of Vero cells were infected with d109 at an MOI of 10 PFU/cell. The indicated amounts of TSA were added at either day 1 or day 7 postinfection (p.i.). d105 was used to superinfect d109-infected cells 1 and 7 days after d109 infection. Fields were photographed 24 hours posttreatment.
