The line was obtained by microinjection of a circular murine BAC transgene (RP24-298F19) previously modified by recombineering at the ATG of the Bglap1 gene of a rabbit-beta-globin intron-cre/ERT2 cassette followed by a flipped PGK-Tn5-Kana/NeoR cassette. The subline 26.3 was analyzed and cryopreserved. (J:82809)