Used in immunological research to study dendritic cell function and immune regulation. Binds to specific ligands on immune cells, helping investigate signaling pathways involved in antigen presentation and T-cell activation. Employed in ELISA, flow cytometry, and protein interaction studies to detect and quantify receptor-ligand binding. Supports development of therapeutic strategies targeting immune responses in autoimmune diseases, infections, and cancer immunotherapy. The Fc tag enables easy detection and purification, enhancing its utility in laboratory assays.