CK-869 is primarily used in research and development within the field of biochemistry and cell biology. It serves as a potent inhibitor of the Arp2/3 complex, which plays a crucial role in actin polymerization, a process essential for cell motility, shape maintenance, and intracellular transport. By inhibiting this complex, CK-869 allows scientists to study the effects of disrupted actin dynamics on cellular functions, providing insights into various biological processes such as cell migration, immune response, and cancer metastasis. This compound is particularly valuable in experimental settings where understanding the role of actin networks is critical, aiding in the development of potential therapeutic strategies targeting diseases associated with abnormal cell movement or cytoskeletal dysfunction.