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  • Title: Virus-specific early antigen expressed in the nucleus of cowpox virus-infected cells.
    Author: Kitamoto N, Hiroi K, Miyamoto K, Tanaka T, Miyamoto H.
    Journal: J Gen Virol; 1990 Jan; 71 ( Pt 1)():235-40. PubMed ID: 2406369.
    Abstract:
    Two monoclonal antibodies (MAbs) were obtained from BALB/c mice immunized with cowpox virus (CPV)-infected cells cultured in the presence of cytosine-1-beta-D-arabinofuranosyl-HCl (Ara C). In the immunofluorescence test, the specific antigen reacting with these MAbs was restricted almost entirely to the nucleus in CPV-infected cells in the presence of Ara C at any time. On the other hand, in CPV-infected cells in the absence of Ara C, the antigen was first detectable within the nucleus 2 h after infection and migrated to the cytoplasm as the infection proceeded. On immunoblotting, only one component with an Mr of 27K was detected 2 to 24 h after infection of cells with CPV in either the presence or absence of Ara C. The antigen was also detected in vaccinia virus-infected cells, but not in any mock-infected cells nor in any virions purified from infected cells. These results suggest that the antigen reacting with the MAbs is virus-specific and a non-structural early antigen.
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