PP-2 is widely used in research as a selective inhibitor of Src family kinases, particularly in studies involving cell signaling pathways. It helps scientists investigate the role of these kinases in processes such as cell proliferation, differentiation, and apoptosis. Due to its ability to suppress T-cell activation, PP-2 is also employed in immunological research to explore mechanisms of immune response and inflammation. Additionally, it has been utilized in cancer research to examine the involvement of kinase activity in tumor growth and metastasis. Its application is primarily limited to in vitro studies and not intended for therapeutic use in humans.