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. 1983 May;46(2):567–574. doi: 10.1128/jvi.46.2.567-574.1983

Isolation of episomal bovine papillomavirus chromatin and identification of a DNase I-hypersensitive region.

F Rösl, W Waldeck, G Sauer
PMCID: PMC255159  PMID: 6302320

Abstract

The investigation of papillomavirus chromatin has been hampered by the unavailability of a tissue culture system for vegetative growth of these viruses. We have used, therefore, bovine papillomavirus type 1-transformed hamster embryo fibroblasts containing 200 to 250 episomal genome equivalents per cell as a source of viral chromatin. The selectively isolated chromatin was shown to be slightly larger (80S) than the mature simian virus 40 chromatin, which was cosedimented in a sucrose density gradient. Both Fo I and Fo II were present in the bovine papillomavirus type 1 chromatin. A fast-sedimenting fraction, whose structure is still unknown, also contained oligomeric bovine papillomavirus type 1 DNA. By in situ DNase digestion of isolated nuclei and subsequent cleavage of the bovine papillomavirus type 1 DNA with various restriction endonucleases, a major DNase-hypersensitive region was detected in the chromatin. This region, comprising approximately 320 base pairs, is located between the relative physical map positions 0.88 and 0.92.

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Selected References

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