Used to measure levels of Interleukin-16 in biological samples such as serum, plasma, or cell culture supernatants. Widely applied in immunology and inflammation research to study immune cell activation, particularly CD4+ T cell responses. Helps investigate the role of IL-16 in diseases like asthma, rheumatoid arthritis, HIV, and multiple sclerosis. Supports biomarker discovery and evaluation of therapeutic interventions targeting inflammatory pathways. Provides a sensitive and specific method for quantifying IL-16 concentration in research settings.