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Septins are a family of proteins that can assemble into filaments within the cytoplasm of eukaryotic cells. They are considered part of the cytoskeleton, a network of protein filaments that provides structural support, maintains cell shape, and facilitates cell movement. While actin filaments and microtubules are dynamic, septins are involved in cell division and have been implicated in other cellular functions. They can form attachment sites for certain proteins and work with other cytoskeletal components to support cell structure.123

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