The putative F-box domain of the endogenous Fbxl7 locus has been deleted (0.12kb deletion) and replaced by a loxP site.
GACATAACTTCGTATAGCATACATTATACGAAGTTATTGAAGCTTGAGCAAAAGCTCATTTCTGAAGAGGACTTGAATGAGGAACAAAAGCTGATTTCGGAGGAAGATTTGAATGAATTC
The putative F-box domain of the endogenous Fbxl7 locus has been deleted (119bp deletion) and replaced by a loxP site.