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Fig. 5. Telomerase activity in fetal germ cell is induced by Kitl. Telomerase
activity was assessed from cell extracts that were equivalent to 200 viable
cells in 12.5 dpc male germ cells. These extracts were freshly withdrawn (lane
1), or withdrawn after 24 hours in culture in the presence (lane 2) or absence
of Kitl (lane 3) or from 14.5 and 15.5 dpc male germ cells (lanes 5 and 6,
respectively). Cell extracts corresponding to 200 spermatogonia were analysed
for comparison (lane 4).