An FRT site, IRES-beta-gal, loxP site, neo cassette, FRT site and loxP site were inserted in intron 1 and a loxP site was inserted in intron 3 via homologous recombination using the EUCOMM targeting vector HTGR06009_A_2_G03. Cre-mediated recombination removed exons 2 and 3 and the neo cassette but left the beta-gal gene intact. (J:256610)