Fig. 5. Currents in embryos arrested at different points in the cell cycle. 2-cell embryos were arrested in late G₂ using cycloheximide (cyclohex); 1-cell and 2-cell embryos were arrested in metaphase using monastrol (monastr) or demecolcine (deme); 2-cell embryos were arrested in prophase using roscovitine (rosc) introduced either about 3 hours or within 1 hour before expected entry into metaphase, as indicated. Annotations are as in the legends to Fig. 1 and Fig. 3.