Used in biomedical research to quantify levels of leukotriene E4 (LTE4) in biological samples such as urine, sputum, and bronchoalveolar lavage fluid. LTE4 is a biomarker associated with inflammatory processes, particularly in asthma and other allergic airway diseases. The kit enables researchers to assess the severity of inflammation and monitor response to anti-inflammatory treatments, especially those targeting the cysteinyl leukotriene pathway. It is widely used in clinical studies, pharmaceutical development, and immunology research to understand the role of leukotrienes in disease mechanisms and to evaluate the efficacy of drugs like leukotriene receptor antagonists.