These mice carry loxP sites flanking exon 65-66 of Fbn1 gene. When crossed with a Cre recombinase-expressing strain, this strain is useful in eliminating tissue-specific conditional expression of Fbn1 gene.While Fbn1-Flox(2)(Stock No.NM-CKO-215082) mice carrying the loxP sites flanking exon 1 of Fbn1 gene. (J:238766)