Lck-IN-1 is primarily utilized in biochemical research as a selective inhibitor of the Lck kinase, a key enzyme involved in T-cell signaling pathways. Its application is significant in studying the mechanisms of T-cell activation and immune response regulation. Researchers employ Lck-IN-1 to explore potential therapeutic strategies for autoimmune diseases, where aberrant T-cell activity plays a critical role. Additionally, it is used in cancer research to investigate the role of Lck in T-cell malignancies and to develop targeted therapies. The compound’s specificity makes it a valuable tool for dissecting signaling pathways and understanding the molecular basis of immune-related disorders.