Live imaging of BB movements and Par3-RFP localization in a polarizing FP cell. wt embryos mosaically expressing Centrin-GFP (green) and Par3-RFP (magenta). White arrows point at the BB at t=0 and at t=30 min, when the BB touches the posterior membrane. Images were taken every 2 min during the 15 s to 17 s stages time-frame. Lateral view. Corresponds to Fig4C.