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  • Title: Transcription of the cottontail rabbit papillomavirus early region and identification of two E6 polypeptides in COS-7 cells.
    Author: Barbosa MS, Wettstein FO.
    Journal: J Virol; 1987 Sep; 61(9):2938-42. PubMed ID: 3039182.
    Abstract:
    Cottontail rabbit papillomavirus (CRPV) early proteins are present at very low levels in virus-induced tumors and cannot be detected by immunological methods. Furthermore, cells in culture are not readily transformed by the virus. To overcome these difficulties in identifying and characterizing the putative transforming protein(s) coded by the E6 open reading frame, the early cottontail rabbit papillomavirus region was expressed under the control of the late simian virus 40 promoter. Mapping of the transcripts in transiently transfected COS-7 cells indicated that transcription was initiated in the late region of simian virus 40. Two E6-coded polypeptides were identified, representing translation products initiated at the first and second AUG codons.
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