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  • Title: SV40 small t antigen enhances the transformation activity of limiting concentrations of SV40 large T antigen.
    Author: Bikel I, Montano X, Agha ME, Brown M, McCormack M, Boltax J, Livingston DM.
    Journal: Cell; 1987 Jan 30; 48(2):321-30. PubMed ID: 3026642.
    Abstract:
    A murine recombinant Neo(r) retrovirus encoding the SV40 small t antigen was used to infect Balb/c 3T3 CIA31 cells. From analyses of G418-resistant clones containing at least as much intact t as Cos-1 cells, we found that t, alone, had no detectable A31 transforming activity. In contrast, we noted that SV40 large T promoted A31 agar colony formation when present over a 5- to 7.5-fold concentration range. However, at the low end of the spectrum, its transforming effect was manifest inefficiently except in the presence of t. Thus a major role for t in the SV40 transforming mechanism is to enhance directly or indirectly the transforming function of T.
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