Relatedness Among Retroviruses: Recombinant Viruses
The general statement has been made that RNA tumor viruses from different species are related to one another and are interrelated in the same way their natural hosts are related (Benveniste and Todaro, 1973; Miller et al., 1974; Okabe, Gilden and Hatanaka, 1973; Haapala and Fischinger, 1973; East et al., 1975). The validity of this statement might be expected, considering the evidence that type-C RNA viruses originated from cell genes. On the other hand, several facts complicate the homology pattern considerably, including the production of several, unrelated viruses by one animal, transmission of viruses between animal species and recombination among viruses.
KeywordsLeukemia Virus Recombinant Virus Mouse Mammary Tumor Virus Rous Sarcoma Virus Avian Leukosis Virus
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