Abstract
The infectivity of the avian leukosis virus-related genes in the DNA of four genetically distinct types of chicken cells was determined. Infectious DNA of Rous-associated virus-O(RAV-O) was obtained from V- chicken cells which were experimentally infected with RAV-O and from V+tvbs chicken cells, which spontaneously produced RAV-O and were sensitive to exogenous RAV-O infection. However, infectious DNA of RAV-O was not obtained from uninfected V- chicken cells or from V+tvbr chicken cells, which spontaneously produced a low titer of RAV-O but were resistant to exogenous RAV-O infection. No detectable amplification of the RAV-O related DNA sequences in the V+tvbs cells was found by hybridization of RAV-O 125I-labeled RNA to the DNAs of V+tvbs and uninfected V- cells. These results indicate that the endogenous avian leukosis virus-related genes in uninfected V- and V+tvbr cells differ from the RAV-O proviruses in RAV-O-infected V- and V+tvbs cells. The lack of infectivity of the DNA of V+tvbr cells is consistent with the hypothesis that the endogenous RAV-O genome in V+tvbr cells is linked to a cis-acting control element, which results in its inefficient expression.
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Selected References
These references are in PubMed. This may not be the complete list of references from this article.
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