Live imaging of a BB bouncing off the posterior membrane in an earlystage FP cell. wt embryos were injected with Centrin-GFP (green) and membrane-Cherry (magenta) mRNAs at the one-cell stage. White arrows indicate the position of the BB at the first and last time-points. Images were taken every 5 minutes during the 6 s to 9 s stages time-frame. Dorsal view. Corresponds to Fig2A.