Frederick lkavBpwqJFNaLuB 6 28 2022 stromectol order online Therefore, Cre recombinase encoded by the CreER transgene is specifically expressed in CD133 DP cells in mouse skin, and can only be activated to induce site specific gene recombination when the mice are treated with tamoxifen or 4 hydroxytamoxifen 4 OHT 21