Used in immunological research to quantify levels of interleukin-2 (IL-2) in biological samples such as serum, plasma, and cell culture supernatants. Enables researchers to monitor T-cell activation and immune response in studies related to autoimmune diseases, infectious diseases, and cancer immunotherapy. Commonly applied in preclinical studies to evaluate the efficacy of therapeutic agents that modulate immune function. Supports high-throughput screening in drug development and biomarker validation due to its sensitivity and specificity.