Bovine papillomavirus E1 protein was found to be as efficient as the simian virus 40 large T antigen in initiating DNA synthesis in a cell-free system derived from COS1 cells. Multiple rounds of DNA synthesis occur, initiated at the bovine papillomavirus type 1 origin. Therefore, E1 functions in vitro as a lytic virus initiator.
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Bonne-Andréa et al. (1995) studied this question.
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