Movie S1.

YFP–ForG-N localizes to macropinosomes (refers to Fig. 1B). Time-lapse recordings of a cell coexpressing LifeAct-mRFP and YFP–ForG-N acquired by confocal microscopy. (Right) Merged channels reveal colocalization of F-actin and ForG at macropinosomes. Time is minutes and seconds. (Scale bar: 5 μm.)