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Fig. 3. Inhibition of Cdk1 activity inhibits the second phase of Ca2+ oscillations. (A) Normal pattern of Ca2+ oscillations after injection with ASE. (B) When p21::GFP protein was injected to inhibitory levels, injection of ASE resulted in only a single Ca2+ rise. Data in A and B are from eggs imaged simultaneously. Arrows indicate time of ASE injection and data is representative of every experiment (n=26, 16 animals).