Abstract

The divergency of endogenous mouse mammary tumor virus (MMTV) in European mouse strains indicates acquisition of exogenous MMTV into their genomes during evolution. In the present study, we selected two strains of Asian wild mice, Cas-Hmi (Mus musculus castaneus) and Sub-Kjr (M. m. subspecies) to investigate a possible divergency of endogenous MMTVs among Asian mouse strains. Southern blot analysis and polymerase chain reaction (PCR) demonstrated that Cas-Hmi and Sub-Kjr have the full structure of integrated endogenous MMTVs, suggesting that these mice were diverged during evolution after MMTV endemics.

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