Used in immunological research to study the role of butyrophilin subfamily 3 member A3 in human immune regulation. Facilitates protein-protein interaction studies due to the hFc tag, enabling detection, purification, and immobilization via Fc receptor binding. Commonly employed in ELISA, flow cytometry, and surface plasmon resonance assays. Supports development of therapeutic antibodies and investigation of gamma-delta T cell activation pathways.