Used to measure levels of human interleukin-1 receptor antagonist (IL-1Ra) in biological samples such as serum, plasma, or cell culture supernatants. This kit is widely applied in research settings to study inflammatory diseases including rheumatoid arthritis, type 2 diabetes, and autoimmune disorders where IL-1Ra plays a regulatory role in inflammation. It enables researchers to quantify protein expression for monitoring disease progression, evaluating therapeutic responses, or investigating immune system modulation. The assay supports high-throughput analysis with reliable sensitivity and specificity, making it suitable for both clinical research and drug development studies.