The line was obtained by microinjection of a circular murine BAC transgene (RP23-334L9) previously modified by recombineering at the ATG of the Ppm1a gene of a rabbit-beta-globin intron-cre/ERT2 cassette followed by a flipped PGK-Tn5-Kana/NeoR cassette. The subline 43.3 was analyzed and cryopreserved. (J:82809)