Used to measure interleukin-27 (IL-27) levels in human serum, plasma, or cell culture samples. Helps in research on immune responses, inflammation, and autoimmune diseases such as multiple sclerosis, rheumatoid arthritis, and inflammatory bowel disease. Supports studies on the role of IL-27 in regulating T-cell activity and cytokine production. Commonly used in clinical labs and biomedical research to understand disease mechanisms and evaluate therapeutic targets.