Protrusion (actin polymerisation) → adhesion (integrins) → contraction (actomyosin) → retraction. Arp2/3 drives lamellipodia, formins drive filopodia.
Protrusion (actin polymerisation) → adhesion (integrins) → contraction (actomyosin) → retraction. Arp2/3 drives lamellipodia, formins drive filopodia.