Used in immunological research to study T-cell activation and co-stimulatory signaling pathways. Serves as a critical reagent in developing and testing monoclonal antibodies and other immune checkpoint modulators. Supports the production of recombinant CD70 protein for use in assays related to immune response regulation, cancer immunotherapy, and autoimmune disease research. Enables consistent, scalable expression of glycosylated human CD70 for functional and structural studies.