Additional file 8.

An NMuMG/Fucci2 Cell Approaching 8C. In the presence of 3 μM etoposide, a cell with a yellowish green nucleus in the normal cycling stayed at G2 checkpoint for some time. Then the cell underwent endoreplication to have a red nucleus, which was further converted to a yellowish green one. The yellowish green-to-red color conversion is indicated by an white arrow. No vestiges of mitosis were observed. Scale bar, 10 μm.

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Sakaue-Sawano et al. BMC Cell Biology 2011 12:2   doi:10.1186/1471-2121-12-2