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/limited-price-U-S-WWII-M3-Submachine-Grease-Gun-Replica-All-Metal-great-offer/