Cleavage furrow

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In this electron micrograph of a cell, the cleavage furrow has nearly completely divided the cell.
In this electron micrograph of a cell, the cleavage furrow has nearly completely divided the cell.

In cell biology, the cleavage furrow is the indentation that begins the process of cleavage, by which animal cells undergo cytokinesis. The same proteins responsible for muscle contraction, actin and myosin, begin the process of forming the cleavage furrow. Plant cells do not form a cleavage furrow. Instead, plant cells begin cytokinesis with the formation of a cell plate.


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