actin filament

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muscle: actin and myosin

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actin filament

cytoskeleton

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major reference

In cell: Actin filaments
Actin is a globular protein that polymerizes (joins together many small molecules) to form long filaments. Because each actin subunit faces in the same direction, the actin filament is polar, with different ends, termed “barbed” and “pointed.” An abundant protein in nearly all…
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cytoskeleton

In cytoskeleton
Actin filaments occur in a cell in the form of meshworks or bundles of parallel fibres; they help determine the shape of the cell and also help it adhere to the substrate. The constantly changing arrays of actin filaments help move the cell and mediate…
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