actin filament
A filamentous structure formed of a two-stranded helical polymer of the protein actin and associated proteins. Actin filaments are a major component of the contractile apparatus of skeletal muscle and the microfilaments of the cytoskeleton of eukaryotic cells. The filaments, comprising polymerized globular actin molecules, appear as flexible structures with a diameter of 5-9 nm. They are organized into a variety of linear bundles, two-dimensional networks, and three dimensional gels. In the cytoskeleton they are most highly concentrated in the cortex of the cell just beneath the plasma membrane.
GO:0099513
polymeric cytoskeletal fiber
is_a
GO:0015629
actin cytoskeleton
part_of
microfilament
exact
SPAPJ760.02c SPBC32H8.12c SPAC23C4.02 SPBC1778.06c SPAC27F1.02c SPCC126.06