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. 1982 Jul 10;10(13):3967–3980. doi: 10.1093/nar/10.13.3967

The changes in proviral chromatin that accompany morphological variation in avian sarcoma virus-infected rat cells.

D J Chiswell, D A Gillespie, J A Wyke
PMCID: PMC320771  PMID: 6287428

Abstract

The clone All of avian sarcoma virus B77-infected Rat-1 cells comprises both morphologically normal and morphologically transformed derivatives. Transformed subclones, in which virus-specific RNA is readily detectable, contain a provirus that is very sensitive to DNase 1 digestion of chromatin, and show DNase 1 hypersensitive sites at the 5' end of the provirus and in 5' flanking cell DNA. Normal subclones with no detectable virus-specific RNA, whether infected cells that have never been transformed or revertants derived from transformed cells, contain a provirus that is far more resistant to DNase 1 digestion. Moreover this provirus lacks hypersensitive sites at its 5' end, although DNase 1 hypersensitive sites were detected at the 3' end of the provirus in either normal or transformed clones. The pattern of cytosine methylation in the proviral restriction sites of the isoschizomers Msp I and Hpa II differed between transformed and revertant clones; the revertants show additional methylation at some CpG doublets.

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Selected References

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