According the the allele molecular image presented by the International Knockout Mouse Consortium, this allele has loxP sites flanking exons 6 and 7, and inserted into the intron between exons 5 and 6 is one FRT site, an engrailed 2 splice acceptor sequence, an EGFP and cre/ERT2 expression cassette, and a Rox flanked puromycin resistance cassette. (J:157065)