CK-636 is primarily utilized in biological research to study the dynamics of actin polymerization. It functions as an inhibitor of the Arp2/3 complex, which plays a crucial role in actin filament nucleation and branching. By inhibiting this complex, CK-636 allows researchers to investigate the mechanisms of cell motility, cytoskeletal organization, and intracellular transport. It is particularly valuable in understanding processes such as cell migration, membrane protrusion, and the formation of cellular structures like lamellipodia. Additionally, CK-636 is employed in studies focused on cancer metastasis, as actin dynamics are integral to the invasive behavior of cancer cells. Its application extends to developmental biology, where it helps elucidate the role of actin in tissue formation and morphogenesis.