Model Description: Il33-KO(3) mice(Stock No.NM-KO-210206) carry a knockout allele derived from the targeted deletion of exon 2. While Il33-KO mice(Stock No.NM-KO-00099) have been pulled from shelves for some reasons and Il33-KO(2) mice(Stock No.NM-KO-190436) carrying the exon 3-7 deletion.