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  • Title: Structure of bovine papillomavirus type 1 DNA in a transformed mouse cell line.
    Author: Allshire RC, Bostock CJ.
    Journal: J Mol Biol; 1986 Mar 05; 188(1):1-13. PubMed ID: 3012096.
    Abstract:
    Linearized bovine papillomavirus type 1 (BPV-1) DNA was introduced into mouse C127 cells, where it recircularized and replicated as an intact monomeric, extrachromosomal circular form in the resulting transformants. These cells contained a mixture of complex high molecular weight forms that were converted to a linear form of approximately BPV-1 size upon digestion with an enzyme that cuts once within the BPV-1 genome. Further analysis of one of these cell lines revealed that these high molecular weight forms consisted of two components. One was detected on agarose gels as a diffuse smear of slow-migrating material representing linear forms that were tightly associated with host chromosomes, probably by integration. The second component was composed of discrete-sized oligomeric open and supercoiled extrachromosomal circular forms of up to approximately 48 X 10(3) base-pairs (6 tandemly linked BPV-1 genomes) in size. No catenated (interlocked) forms could be detected.
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