Tg(Mnx1-cre/ERT2)4Rbro

The bacterial artificial chromosome (BAC) clone RP24-351I23 containing the mouse Mnx1 (Hb9) gene was modified using recombineering bacterial strain to introduce the cre/ERT2-BGH polyA and Frt-Zeo-Frt selection cassette into the exon 1 replacing the Mnx1 coding region. The Frt-Zeo-Frt cassette is retained in the transgene but lacks a eukaryotic promoter. Three founder lines (4, 8, and 10) were generated. Line 10 gave low-level inducible activity and was terminated. Line 4 and Line 8 displayed similar inducible recombination activity in the desired cell populations and were maintained. Lines 4 and 8 were indistinguishable, and line 8 was used for the majority of studies described. (J:309433)