Microtubules are the largest type of filament, with a diameter of about 25 nanometers (nm), and they are composed of a protein called tubulin. Actin filaments are the smallest type, with a ...

During anaphase, the central region of the microtubule spindle reorganizes to produce the midzone — an array of antiparallel microtubules essential for cell division. Two studies in Cell have ...