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Figure 4


Fig. 4. Long lasting {Delta}90 cyclin B1 mediated oscillations stop rapidly when Cdk1 activity is inhibited. (A) Long lasting oscillations in an egg injected with {Delta}90 cyclin B1:: GFP protein and then ASE. (B) Rapid termination of oscillations when an egg previously injected with {Delta}90 cyclin B::GFP and ASE is then injected with p21::GFP protein. Black arrows indicate time of ASE injection, open arrow the time of p21::GFP injection. Data in A and B are from eggs imaged simultaneously. Time of termination was 8.33±0.58 minutes (mean ± s.e.m.) (n=8, four animals).