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Microtubulin is an important protein filament which is a major component of the cytoskeleton[1]. It is made up from globular tubulin dimers, which come together to form hollow cylinders 24 nm in diameter[2]. Microtubulin has numerous functions; for example they play a vital role in cell division and protein movement around the cell, and in animal cells they extend from the centrosome and spread across the cell to form a transport network as part of the cytoskeleton. In mitosis the microtubules are responsible for separating the chromosomes into the two daughter cells by attaching to them as mitotic spindles[3].


  1. 2 W. H. Freeman and Company (2000).Molecular Cell Biology. 4th edition.Section 19.1 Microtubule Structures.
  2. David R. Caprette http://www.ruf.rice.edu/~bioslabs/studies/invertebrates/microtubules.html
  3. Inkling. (2014). alberts essential cell biology. Available: https://www.inkling.com/read/alberts-essential-cell-biology-4th/chapter-17/microtubules. Last accessed 20th October 2014.
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