Treadmilling occurs only after the steady state is reached. The addition of cytochalasin will block treadmilling. It severs actin filaments and then caps the new plus end of the actin filament. A few filaments form and attach to the membrane by the plus end. In activated male gametes the sperm cell builds an actin filled acrosomal tube.
Several polymers align end to end and then polymerize d.
I is essential for motility. Myosin I is restricted to the leading edge and in myosin II deletion mutants motility ceases, indicating that myosin II is essential for motility. I is found on the trailing edge. Both a and c 14. The role of accessory or actin binding proteins in controlling actin polymerization was demonstrated by a. microinjection of platelets with network proteins.