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The molecular clone of feline foamy virus (pCF-7) and FeFAB cells for FeFAB assay were kind gifts from Dr Martin Löchelt, German Cancer Research Center, Germany.

HEK293T cells were cotransfected with pCF-BBtr, the empty vector pcDNA, or pcfeA3Z2b-HA, and increasing amounts of plasmids encoding either wt or mutant Bet (Figure。

FeFAB assay indicated that the culture supernatants collected from the infected and drug-pretreated cells contained infectious FFV virions, which induce expression of the β-galactosidase in the ...

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