Lck inhibitor 2 is primarily used in research settings to study and modulate T-cell signaling pathways. It specifically targets the Lck kinase, a key enzyme involved in T-cell activation and immune response regulation. By inhibiting Lck, researchers can investigate the role of T-cells in autoimmune diseases, cancer, and other immune-related disorders. This compound is valuable in developing potential therapies for conditions where T-cell activity needs to be controlled, such as in organ transplantation or autoimmune conditions like rheumatoid arthritis. Additionally, it serves as a tool in preclinical studies to understand the mechanisms of immune system modulation and to identify new drug candidates targeting T-cell signaling.