Summary:
- The eukaryotic cytoskeleton is made up of a network of long, thin protein fibers.
- It helps to maintain cell shape and holds organelles in place.
- It also plays important roles in both the intracellular movement of substances and in cell division.
- Three main kinds of cytos skeleton fibers are microtubules, intermediate filaments, and microfilaments.
- Microtubules are hollow cylinders made of polymers of alpha and beta tubulin.
- Intermediate filaments made of the protein keratin are found in skin, hair, and nails cells.