Like poles support a tent, microtubules—hollow cylindrical structures made of tubulin protein—support eukaryotic cells. But microtubules provide more than just mechanical strength; they help prepare the cell for cell division and migration and work as a railway track on which motor proteins transport materials within the cell.
Click here for original story, Like a flexible Lego railway track: How stable microtubules form within cells
Source: Phys.org