The exon1-5 and partial exon6 of endogenous mouse Tnfrsf4(Ox40) gene was replaced by the corresponding region of human TNFRSF4(OX40) gene. While hOX40(Stock No.NM-HU-00041) mice function similarly to hOX40(2) mice,for more detailed information please contact our technical advisor. (J:238766)