FBXW7 and lymphoma: Analysis of allele-specific deletions of Fbxw7 locus in mouse lymphomas showed that the pattern in three different sets of F1 hybrid was 100% specific: the allele contributed by the C57BL/6 parent was selectively retained, while alleles from either Mus spretus or 129/Sv were preferentially lost, in lymphomas from the respective F1 hybrid animals.