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. Author manuscript; available in PMC: 2009 Jun 16.
Published in final edited form as: Dev Dyn. 2008 May;237(5):1232–1242. doi: 10.1002/dvdy.21516

Figure 4. Cell cycle properties of E2f6 and Bmi1 mutant MEFs.

Figure 4

Mouse embryonic fibroblasts of wild-type (υ), Bmi1 mutant (σ, 5), and E2f6;Bmi1 compound mutant (Σ, λ) mice were assayed for (A) asynchronous proliferation rate, (B) senescence properties, (C) S-phase re-entry following serum withdrawal and re-addition, and (D) p16INK4a and p19ARF expression by RT-PCR from serum-starved cells.