Cell cycle‐dependent RECQ4–MCM complex formation.

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Cell cycle‐dependent RECQ4–MCM complex formation. Cell cycle‐dependent RECQ4–MCM complex formation. (A) (Upper) flow cytometry of 293T:FLAG–RECQ4 cells at different time points after release from serum starvation and nocodazole double synchronization. Unreplicated cells are identified with DNA content 1C, whereas 2C DNA content represents replicated cells. (Lower) whole‐cell extracts of the synchronized cells were blotted with Cyclin A antibody to confirm S and G2 phases. (B) Cell cycle‐dependent protein expressions of the endogenous RECQ4, MCM10, MCM7 and Sld5 by western blotting analysis. (C) Western analysis of the chromatin‐bound (top panel) and immunopurified FLAG–RECQ4 (2nd–4th panels from top) using M2‐agarose from cells synchronized at different time points after nocodazole release. The purified chromatin‐bound complexes were analysed with the indicated antibodies to detect the presence of RECQ4, MCM10, MCM7 and SLD5. (D) The abundance of MCM10, MCM7 and SLD5 relative to RECQ4 protein concentration in the purified complex from different time points is quantified based on the western blotting signals shown in part (C). Xiaohua Xu et al. EMBO J. 2009;28:3005-3014 © as stated in the article, figure or figure legend