Summary: During cytokinesis. a contractile ring consisting of unbranched filamentous actin (F-actin) and myosin II constricts at the cell equator. Unbranched F-actin is generated by formin. and without formin no cleavage furrow forms. https://www.bekindtopets.com/top-price-Disney-Bambi-Thumper-Character-Pattern-Galaxy-S23-Clear-Case-p110724-huge-savings/