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