Used in immunological research to study B cell maturation and survival pathways. Functions as a soluble receptor to neutralize BAFF and APRIL, helping regulate B cell activation in autoimmune disease models. Employed in protein binding assays and surface plasmon resonance to characterize interactions with ligands or therapeutic antibodies. Supports development of biologics targeting plasma cell disorders such as multiple myeloma. Commonly used in Fc-mediated detection and purification systems due to the Fc tag.