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  • Title: [Preparative isolation and some properties of SV40 T-antigen].
    Author: Driza OB, Voskoboinik AD, Polotskaia AV, Shliankevich MA, Shapot VS.
    Journal: Biokhimiia; 1977 Aug; 42(8):1471-7. PubMed ID: 199285.
    Abstract:
    SV40 T-antigen was isolated from hamster tumors and purified about 1600-fold by the procedure including successive ammonium sulfate precipitation, chromatography on DEAE-cellulose, preparative polyacrylamide gel electrophoresis and elimination of the bulk of contaminating cell proteins by the interaction with antibodies to the tissues of normal hamsters. The resulting preparation was not quite homogenous being contaminated with some of cell proteins left. T-antigen in the tumor extract was revealed at least in three distinct forms with molecular weight of 100 000, 200 000, and 400 000. It is proposed that these forms correspond to mono-, di-, and tetramers of the basal protein of T-antigen, although the alternative explanation, the existence of complex of T-antigen with cell proteins, cannot be ruled out.
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