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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。

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.

Briefly, FeFAB cells are the modified CRFK cells that express β-galactosidase under the control of the FFV LTR, which is trans-activated by the FFV Tas protein in relation to。

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