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FeFAB cells (a kind gift from Dr Martin Löchelt, Germany) are modified CRFK cells that are used for FFV infection experiments. FeFAB cells express β-galactosidase under the control of the FFV LTR, which is trans。

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

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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