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Several lambda proto-amv recombinants isolated from a lambda Charon 4A library of leukemic chicken DNA were analyzed by using various restriction endonucleases and hybridization with specific probes representing different regions of the transforming gene of avian myeloblastosis virus. The position of 30 sites for 11 different restriction endonucleases was established in the proto-amv region of chicken DNA. Identical restriction endonuclease maps were obtained for the normal and leukemic DNAs in the proto-amv domain, which covers 8 to 9 kilobases of DNA. The cellular genetic elements homologous to the cellular sequence (amv) inserted into the avian myeloblastosis virus genome are contained within six major proto-amv segments which are interrupted by at least five large DNA regions lacking homology with amv.

journal of virology

Organization of chicken DNA sequences homologous to the transforming gene of avian myeloblastosis virus. II. Isolation and characterization of lambda proto-amv DNA recombinant clones from a library of leukemic chicken DNA