Used to measure levels of soluble interleukin-2 receptor alpha (sIL-2Rα) in human biological samples such as serum, plasma, or cell culture supernatants. This assay is commonly applied in clinical and research settings to assess immune system activation. Elevated levels of sIL-2Rα are associated with various autoimmune diseases, cancers, and chronic inflammatory conditions, making this kit valuable for disease monitoring and diagnosis. It enables quantitative analysis, supporting studies on T-cell activation and immune response regulation.