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. 1981 Sep;39(3):808-15.
doi: 10.1128/JVI.39.3.808-815.1981.

Lack of AKR ecotropic provirus amplification in AKR leukemic thymuses

F K Yoshimura, M Breda

Lack of AKR ecotropic provirus amplification in AKR leukemic thymuses

F K Yoshimura et al. J Virol. 1981 Sep.

Abstract

A DNA fragment from the 3' region of a molecularly cloned AKR ecotropic provirus was identified to be specific for the AKR ecotropic murine leukemia virus (MuLV). This selected DNA fragment was used to analyze the integrated MuLV proviruses in normal and leukemic tissue DNAs of AKR mice. In comparison with a DNA fragment from the 5' region of the cloned AKR genome or one representing the entire genome, this selected probe hybridized to only a few MuLV proviruses. By comparing transformed and nontransformed tissue DNAs, it appeared that no amplification of proviral sequences related to the AKR ecotropic MuLV had occurred in thymomas of AKR mice during the development of leukemia in these animals. Analysis of the AKR ecotropic MuLV proviruses revealed a significant degree of polymorphism for these sequences among individuals in the AKR/J strain of mouse.

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