Intermediate filament
[1] Intermediate Filament
Structure
Intermediate Filaments, are also called microfilaments, form long bands of tetrameric subunits. Accessory filaments help to keep the bundles together. For example, Plectin links the intermediate filaments to actin tubule bundles, myosin II and microtubles. This proten also binds intermediate filaments to the plasma membrane. Most of the intermediate filaments are cross linked and use the accessory filaments to do so.
These filaments have a diameter of 5-9nm.
([2]Alberts, B (2008). Molecular Biology of The Cell. 5th ed. New York: Garland Science. 968.)