Microtubules

• Microtubules are the railways of the cell
• They are huge, sturdy filaments that extend through the cytoplasm, providing support and providing tracks for the motion of two types of protein motors: kinesin and dynein. These motors pull many types of cargo through the cell, ranging from small vesicles to entire mitochondria.
• They also play a key role in the process of cell division, separating the duplicated chromosomes into two daughter cells.
• PDB 101: microtubules