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. 1981 Dec;40(3):735–744. doi: 10.1128/jvi.40.3.735-744.1981

Genetic mapping of endogenous mouse mammary tumor viruses: locus characterization, segregation, and chromosomal distribution.

V L Traina, B A Taylor, J C Cohen
PMCID: PMC256685  PMID: 6275115

Abstract

The restriction endonuclease EcoRI has been used to study the inheritance of strain difference in endogenous mouse mammary tumor virus DNA sequences. This enzyme, which cleaves at only one site within the nondefective viral genome, generates DNA fragments containing mouse mammary tumor virus sequences which vary in size according to the locations of EcoRI restriction sites in the flanking mouse sequences, thereby defining unique integration sites of the viral genome. Recombinant inbred strains of mice have been used to study the inheritance of these DNA fragments which hybridize to mouse mammary tumor virus cDNA sequences. The results define 11 segregating units consisting of 1 or 2 fragments. These units were shown to segregate among the recombinant inbred strains, and in some instances linkage was established. Two units were shown to be linked on chromosome 1. Another unit was mapped to chromosome 7, which is presumably identical to the previously defined genetic locus Mtv- 1. One other mouse mammary tumor virus locus was tentatively assigned to chromosome 6. The results are consistent with the view that integration of mouse mammary tumor virus can take place at numerous sites within the genome, and once inserted, these proviruses appear to be relatively stable genetic entities.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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