Used in immunological research to study T cell and NK cell activation, survival, and proliferation. Serves as a critical reagent in assays evaluating cytokine signaling pathways involving IL-15. Employed in protein-protein interaction studies due to its ability to bind IL-15 with high affinity. Utilized in the development and validation of therapeutic antibodies targeting the IL-15 pathway. Applied in immunoassays such as ELISA, surface plasmon resonance, and flow cytometry for detection and quantification of IL-15 or related receptors. Supports the expansion of NK cells in ex vivo culture systems for adoptive immunotherapy research.