Contractile ring

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The contractile ring consists mainly of actin filaments and myosin filaments. It is found arranged in a ring around the equator of the cell and plays a key role during cytokinesis. Towards the end of mitosis, it starts to assemble just beneath the plasma membrane. As the ring contracts, it pulls the membrane inward; dividing the cell in two[1].  

References

  1. Alberts, B. 2009. Essential cell biology. New York: Garland Science.
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