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Formation of Rous associated virus-60: origin of the polymerase gene



Formation of Rous associated virus-60: origin of the polymerase gene



Journal of Virology 29(3): 856-862



The DNA of normal chicken embryos contains sequences related to the avian leukosis-sarcoma viruses. RNA-dependent DNA polymerase of these viruses is encoded by a genetic element known as the pol gene. The nature of the endogenous virus pol gene in chicken cells was investigated by testing its ability to participate in genetic recombination. Rous-associated virus-60-type recombinant viruses isolated after infection of chicken cells with strains tsLA337PR-B or tsNY21SR-A, both of which produce a temperature-sensitive DNA polymerase, also possessed the temperature-sensitive lesion. These results are consistent with the hypothesis that the endogenous viral information used for the generation of Rous-associated virus-60 is deficient in at least part of the pol gene and that the defect includes that portion represented by the lesions in NY21 and LA337. The frequency of polymerase-negative BH-Rous sarcoma virus alpha formation was not affected by the levels of endogenous viral expression, which suggests that the alpha defect is not derived from the endogenous pol gene.

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Accession: 038940826

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PMID: 87520



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