Ifnar1^tm1.2Ees

The targeting vector was designed to insert a self-excising FRT-Prm1pFlppol2Neo-FRT cassette and loxP site in intron 2, and a second loxP site in intron 3 of the gene. Facilitated self-excision of the cassette in the male germline and resulted in offspring with one FRT site and loxP site upstream of exon 3, and a second loxP site downstream of exon 3. Cre-mediated recombination removed the floxed neo cassette and exon 3. The resulting non-functional protein contains an exon 2-4 splice variant and frameshift leading to translation of 11 arbitrary (missense) amino acids within the N-terminal extracellular domain followed by a stop codon. (J:229084)