1. Several proteins are involved in directional migration in epithelial cells.Rapid actin polymerization of cell front edge. ARP 2/3 has role in regulation of actin cytoskeleton Formins are protein that polymerizes actin and help in growing end of actin All mentioned protein are involved in it i.e actin, myosin, thymosin , ... arp 2/3 2.Answer : All options are correct. actin involved in muscle contraction with sliding of actin and myosin filament, in cytokines actin filament act till two small daughter cell pinched off,in cell migration , and in bacterial division. Solution 1. Several proteins are involved in directional migration in epithelial cells.Rapid actin polymerization of cell front edge. ARP 2/3 has role in regulation of actin cytoskeleton Formins are protein that polymerizes actin and help in growing end of actin All mentioned protein are involved in it i.e actin, myosin, thymosin , ... arp 2/3 2.Answer : All options are correct. actin involved in muscle contraction with sliding of actin and myosin filament, in cytokines actin filament act till two small daughter cell pinched off,in cell migration , and in bacterial division..