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  • Title: Deletion of the gag region from FBR murine osteosarcoma virus does not affect its enhanced transforming activity.
    Author: Miller AD, Verma IM, Curran T.
    Journal: J Virol; 1985 Sep; 55(3):521-6. PubMed ID: 2991577.
    Abstract:
    Both FBJ murine osteosarcoma virus (FBJ-MSV) and FBR-MSV induce transformation in tissue culture and osteogenic sarcomas in mice. In tissue culture, however, FBR-MSV induces larger foci with a shorter latency than those induced by FBJ-MSV. Transformation is dependent on expression of the fos oncogene in FBJ-MSV and of a gag-fos fusion protein in FBR-MSV. We have determined that the gag sequences can be deleted from FBR-MSV without affecting the high transforming activity of this virus in comparison to FBJ-MSV. The resultant virus, designated FBJ/R-MSV, has a protein coding region that is half the size of that of FBR-MSV and about one-third smaller than that of FBJ-MSV. Thus, FBJ/R-MSV will provide a useful tool for studying the transforming activity of the fos oncogene.
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