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Cyclin-Dependent Kinases.Enzymes that activate or inactive other proteins by phosphorylating them. Particular ones give the go-ahead signals at the G1 and G2 checkpoints. Present at a constant concentration in the growing cell - but much of the time

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1. Cyclin-Dependent Kinases.Enzymes that activate or inactive other proteins by phosphorylating them. Particular ones give the go-ahead signals at the G1 and G2 checkpoints. Present at a constant concentration in the growing cell - but much of the time





 
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