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Access to the article is free, however registration and sign-in are required. Epithelial cells need to remain firmly attached to each other and to the extracellular matrix. In the event that these cells become detached, they undergo apoptosis. In a Perspective, Hunt and Evan discuss new work that identifies the trigger that sets in motion the apoptosis program following detachment (Puthalakath et al.). The trigger turns out to be the pro-apoptotic protein Bmf. This protein is attached to the myosin V motor complex of the actin cytoskeleton under normal conditions, but is set free once cells become detached.
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