GFP-Tws and Endos-RFP become enriched in the nuclear/spindle area in prometaphase until anaphase. Time-lapse imaging of an embryo expressing GFP-Tws and Endos-RFP. Images were taken every 30 s, and multiple z-steps were combined in an average intensity projection. Scale bar: 20 µm. The video is accelerated 140×.