During Contractile Ring Formation?

Formed during cytokinesis, the last step of cell division, the contractile ring is composed of filamentous actin (F-actin) and the motor protein myosin-2, along with additional structural and regulatory proteins.

During what phase of mitosis does a contractile ring form?

Cytokinesis starts during the nuclear division phase called anaphase and continues through telophase. A ring of protein filaments called the contractile ring forms around the equator of the cell just beneath the plasma membrane.

What is the role of contractile ring?

Composed of actin, myosin and many other proteins, it assembles in anaphase and contracts as cells divide. The contractile ring is responsible for cytokinesis in many eukaryotic cell types, and is thought to contribute to cell division by 'squeezing' the cell into two.