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Actin Beads and VASP

Actin Beads and VASP

Beads recruiting the Arp2/3 complex and VASP form comets in cell extracts and are propelled forward.  Observation by electron microscopy (middle, 500 nm diameter bead, actin filaments appear as white strands) or confocal fluorescence microscopy (right, 4.5 mm diameter bead, actin comet in red).