These mice carry loxP sites flanking exon 2-3 of Wt1 gene. When crossed with a Cre recombinase-expressing strain, this strain is useful in eliminating tissue-specific conditional expression of Wt1 gene.While Wt1-Flox(2) mice (Stock No.NM-CKO-200234) have been pulled from shelves for some reasons. (J:238766)