Used in biomedical research to quantify levels of Fas ligand (FASL) in biological samples such as serum, plasma, or cell culture supernatants. This ELISA kit enables researchers to study the role of FASL in apoptosis, immune regulation, and inflammatory diseases. It is particularly useful in studies related to autoimmune disorders, cancer progression, and organ transplant rejection where dysregulation of cell death pathways is involved. The assay provides a sensitive and specific means to monitor FASL expression under experimental conditions, supporting both basic research and preclinical evaluation of therapeutic agents targeting the FAS/FASL pathway.