According to the allele molecular image presented by the International Knockout Mouse Consortium, this allele has one FRT site, an engrailed 2 splice acceptor sequence, an EGFP and cre/ERT2 expression cassette, and a neomycin resistance cassette inserted into intron 3' of exon 3. A single loxP site is inserted between exons 3 and 4. (J:155845)