Forer, ArthurPickett-Heaps, JeremySpurck, Tim2021-02-222021-02-222008-04Protoplasma. 2008;232(3-4):137-41.0033-183Xhttps://doi.org/10.1007/s00709-008-0286-yhttp://hdl.handle.net/10315/38112We discuss models for production of tubulin flux in kinetochore microtubules. Current models concentrate solely on microtubules and their associated motors and enzymes. For example, in some models the driving force for flux is enzymes at the poles and the kinetochores; in others the driving force is motor molecules that are associated with a stationary spindle matrix. We present a different viewpoint, that microtubules are propelled poleward by forces arising from the spindle matrix, that the forces on the microtubules "activate" polymerising and depolymerising enzymes at kinetochores and poles, that matrix forces utilise actin, myosin, and microtubule motors, and that the matrix itself may not necessarily be static.enSpringer This is a post-peer-review, pre-copyedit version of an article published in Protoplasma. 2008;232(3-4):137-41.. The final authenticated version is available online at: https://doi.org/10.1007/s00709-008-0286-y. More information on Springer Nature terms of reuse for archived author accepted manuscripts (AAMs) of subscription articles can be found at https://www.springer.com/gp/open-access/publication-policies/aam-terms-of-use.Attribution-NoDerivatives 4.0 Internationalmitotic spindlespindle matrixmicrotubule dynamicsactinmyosinArticlehttps://www.ncbi.nlm.nih.gov/https://link.springer.com/https://pubmed.ncbi.nlm.nih.gov/18421550/