Fig. 2. TR and TERT expression are induced by Kitl treatment. RT-PCR from spermatogonia RNA after 24 hours of culture without (ctrl) or with the addition of Kitl (Kitl) using mTR- (A) and mTERT- (B) specific primers. Hprt amplification has been used to verify RNA integrity. (C) Kit amplification was performed to show that equal amounts of Kit-expressing cells were analyzed.