Abstract
A provirus DNA that contains a gag-erbB fused gene as the sole and transforming gene was molecularly constructed from plasmid pSRA2 containing the entire genome of Rous sarcoma virus and pAE7.7 containing the entire genome of an avian erythroblastosis virus (AEV), AEV-H. A virus containing the gag-erbB fused gene (GEV) was recovered from chicken embryo fibroblasts transfected with the proviral DNA and a helper virus DNA. GEV could transform chicken embryo fibroblasts as efficiently as could AEV-H. Anti-erbB and anti-gag sera immunoprecipitated a protein with a molecular weight of about 110,000 from GEV-transformed cells. The erbB and gag-erbB fused-gene products in AEV-H- and GEV-transformed cells were analyzed.
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