 Nuclear events of mitosis are initiated when the protein kinase cyclin-B1-Cdk1 is translocated into the nucleus during prophase.     ///    Control of mitosis by changes in the subcellular location of cyclin-B1-Cdk1 and Cdc25C..     ///    Recent work has unveiled many of the mechanisms that govern the localization of cyclin-B1-Cdk1 and its regulator Cdc25C. 