Cells arrested in mitosis by inactivation of the APC/C complex sometimes manage to exit mitosis in a process called mitotic slippage, which helps cancer cells circumvent chemotherapy drugs. Balachandran et al. show that mitotic slippage occurs as a result of targeting of cyclin B1 for degradation by the ligase CRL2ZYG11.
The oocyte-to-embryo transition requires drastic reorganizations within a short timeframe. Recent studies show that, in the nematode Caenorhabditis elegans, phosphotyrosine-binding pseudo-phosphatases are key regulators of this critical developmental transition.
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