pubmed-article:186616 | pubmed:abstractText | Leukemia-prone hairless (HRS/J; hr/hr) mice had significantly higher leukemia virus titers than did the leukemia-resistant nonmutants (hr/ + and +/+). This difference was ascribed to the allelic substitution at a single gene locus; at 6 months of age it averaged 13-fold, immediately preceding the large divergence in leukemia incidence between the mutant and nonmutant mice. | lld:pubmed |