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What are they? Focal adhesions are the anchor points of the cell. These dynamic cytoskeletal structures are regions where the cell membrane firmly attaches to the extracellular matrix or the substratum. At the same time, focal adhesions provide scaffolding; they associate with an elaborate actin network inside the cell. Importantly, it's now known that focal adhesions also act as communication ports between the inside and the outside of the cell.

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