Protein filament

Developing wood cells in poplar showing microfilaments (in green) and cell nuclei (in red)

In biology, a protein filament is a long chain of protein monomers, such as those found in hair, muscle, or in flagella.[1] Protein filaments form together to make the cytoskeleton of the cell. They are often bundled together to provide support, strength, and rigidity to the cell. When the filaments are packed up together, they are able to form three different cellular parts. The three major classes of protein filaments that make up the cytoskeleton include: actin filaments, microtubules and intermediate filaments.

  1. ^ Speer B, Waggoner B (13 August 1995). "Filament". UCMP Glossary: Cell biology. Berkeley, CA: Museum of Paleontology, University of California. Retrieved November 2, 2011.