Arp2/3 complex localises to actively protruding filopodia. A. DIC image taken 60' after plating and prior to fixation. Box indicates area shown in B. Scale bar 10 μm. B. Frames taken from DIC timelapse at times indicated after plating. Scale bar 2 μm. C. Arp2/3 complex labelling in the same filopodium pictured in B and shown in Movie 2. Scale bar 2 μm.