Movie 7.

Live imaging of microtubule dynamics and BB movements in a FP cell at the 5s stage. wt embryos were injected with EB3-GFP, Centrin-GFP (Fire LUT, coding for fluorescence intensity) and membrane-Cherry (green) mRNAs at the 16-cell stage. and then imaged for 8min every 10 seconds at the 5s stage. White arrow at t=0ʺ points at the BB. White arrows at t=150ʺ, t=160ʺ, t=280ʺ and t=290ʺ point at posterior membrane deformation and yellow arrowheads at t=150ʺ and t=280ʺ point at microtubules linking BB and posterior membrane at the spot where the membrane bends and toward which BB will move. Dorsal view. Corresponds to FigS2D.