Abstract
Microtubule polymerization in vitro is the summation of different reactions occurring at each end of the polymer. In steady-state conditions in vitro, net tubulin addition on to the microtubule occurs at one end of the polymer, and net tubulin loss occurs at the opposite end. Thus, a unidirectional flux of tubulin from one end of the microtubule to the other, or ‘treadmilling’, can occur. The opposite end assembly–disassembly behaviour of microtubules, if it occurs within cells, could be fundamentally linked to the functions of microtubules, as, for example, in the translocation of chromosomes during mitosis.
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Margolis, R., Wilson, L. Microtubule treadmills—possible molecular machinery. Nature 293, 705–711 (1981). https://doi.org/10.1038/293705a0
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DOI: https://doi.org/10.1038/293705a0
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