Used in immunological research to study T-cell and B-cell signaling pathways. Helps in the purification and detection of immune cells due to its specific binding properties. Employed in protein-protein interaction studies, particularly in examining receptor-ligand interactions within the immune system. Serves as a reagent in flow cytometry, ELISA, and Western blot applications for immune cell characterization. Supports development of therapeutic antibodies by acting as a target antigen in assay systems.