Used in research to study immune system signaling, particularly in T cells and Hodgkin's lymphoma. Binds to CD30 ligand and modulates inflammatory responses. Employed in protein-protein interaction assays and as a detection tool in ELISA and flow cytometry. Supports development of therapeutic antibodies targeting CD30-expressing cancers. Enables purification of CD30 ligand due to Fc-mediated binding to Protein A/G.