Used in immunological research to study cytokine signaling pathways, particularly the common gamma chain (γc) shared by receptors for IL-2, IL-4, IL-7, IL-9, IL-15, and IL-21. Serves as a critical tool for investigating T cell, B cell, and NK cell development and function. Employed in protein-protein interaction studies due to the Fc tag, enabling easy detection and purification. Utilized in immunoassays such as ELISA, flow cytometry, and Western blot to generate standard curves or as a blocking agent. Supports the development of therapeutic antibodies targeting γc in autoimmune diseases and cancers. Also used in structural studies to understand receptor-ligand interactions and guide drug design.