https://www.selleckchem.com/pr....oducts/pf-06424439.h
Complete Ndd1 phosphorylation by Clb2-Cdk1-Cks1 requires the phosphothreonine-binding site of Cks1, as well as a recently identified phosphate-binding pocket on the cyclin Clb2.17 We therefore propose that initial phosphorylation by Cdk1 primes Ndd1 for delayed secondary phosphorylation at suboptimal sites that promote degradation. Together, our results suggest that rising levels of mitotic Cdk1 activity act at multiple phosphorylation sites on Ndd1, first triggering rapid positive feedback and then promoting delayed negative feedba
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