Abstract
Actin filament branch initiation by the Arp2/3 complex requires that the Arp2 and Arp3 subunits are loaded with ATP. However, whether ATP hydrolysis is required for branch initiation or subsequent debranching is controversial. New analysis of budding yeast Arp2/3 mutants suggests that debranching, not branching, depends on ATP hydrolysis.
Published Version
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