The line was obtained by microinjection of a circular murine BAC transgene (RP24-168A7) previously modified by recombineering at the ATG of the Pf4 gene of a rabbit-beta-globin intron-CreERT2 cassette followed by a flipped PGK-Tn5-Kana/NeoR cassette. The subline 3.21 was analyzed and cryopreserved. (J:82809)