Abstract:Cell cycle remodeling from fast nuclear cycles to a generic cell cycle mode is a major feature of the mid-blastula transition (MBT) in Drosophila. Remodeling occurs when Twine/Cdc25 falls below a critical threshold. Timing is based on Twine destabilization induced by zygotic transcription. It is conceivable that appropriate starting levels are also important for timely reaching the threshold. Mechanisms for controlling Twine levels at the onset of MBT are unknown. Here we identify a function of the protein pho… Show more
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