Used in immunological research to quantify levels of CXCL16 in biological samples such as serum, plasma, and cell culture supernatants. Helps in studying inflammatory processes, immune cell recruitment, and diseases like atherosclerosis, rheumatoid arthritis, and certain cancers where CXCL16 plays a role. Enables researchers to assess the expression and regulation of this chemokine in experimental models, supporting biomarker discovery and therapeutic development.