E2f1–3 switch from activators in progenitor cells to repressors in differentiating cells
2009
The in vivo function of E2f transcription factors has been a matter of debate. The effects of E2f1, E2f2 and E2f3 triple deficiency are now examined in murine embryonic stem cells, embryos and small intestines. E2f1–3 are shown to function as transcriptional activators in normal dividing progenitor cells; however, contrary to the current view, they are dispensable for cell division but are necessary for cell survival.
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