Objective To study the effects of 14-3-3 proteins in regulation of the first mitotic cell cycle in one-cell stage mouse fertilized eggs.Methods 14-3-3 isoform in the mouse fertilized eggs was identified by RT-PCR.14-3-3 siRNA was introduced to G1 phase fertilized eggs by microinjection to study the cleavage rate,morphology and MPF activity.Results 14-3-3 ε was identified in one-cell stage of mouse fertilized eggs.Compared with the control group,the cleavage rate in pSUPER-14-3-3ε siRNA injection group was s...