Used in biomedical research to quantify soluble tumor necrosis factor-related apoptosis-inducing ligand (sTRAIL) in biological samples such as serum, plasma, and cell culture supernatants. Enables researchers to study the role of sTRAIL in apoptosis, immune regulation, and cancer progression. Commonly applied in studies related to autoimmune diseases, viral infections, and tumor biology to assess sTRAIL levels as a potential biomarker. The kit supports high-throughput analysis with high sensitivity and specificity, making it suitable for both clinical research and drug development.