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During cell division, a microtubule-based mitotic spindle mediates the faithful segregation of duplicated chromosomes into daughter cells. Proper length control of the metaphase mitotic spindle is critical to this process and is thought to be achieved through a mechanism in which spindle pole separation forces from plus-end-directed motors are balanced by forces from minus-end-directed motors that...
Microtubules are key structural and transport elements in cells. The dynamics at microtubule ends are characterized by periods of slow growth, followed by stochastic switching events termed “catastrophes,” in which microtubules suddenly undergo rapid shortening [1]. Growing microtubules are thought to be protected from catastrophe by a GTP-tubulin “cap”: GTP-tubulin subunits add to the tips of growing...
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