Used to measure levels of interleukin-1 receptor antagonist (IL1Ra) in mouse biological samples such as serum, plasma, or cell culture supernatants. This kit is commonly applied in immunology and inflammation research to study the role of IL1Ra in diseases like arthritis, sepsis, diabetes, and neurodegenerative conditions. It helps researchers understand immune regulation, as IL1Ra acts as a natural inhibitor of pro-inflammatory cytokine IL-1, making it valuable in studies focused on inflammatory balance and therapeutic interventions.