Used in immunological research to quantify levels of Human Decay-Accelerating Factor (DAF) in biological samples such as plasma, serum, and cell culture supernatants. This ELISA kit enables researchers to study DAF's role in regulating the complement system, particularly in conditions involving complement-mediated tissue damage. It is widely applied in studies of autoimmune diseases, transplant rejection, and cancer, where DAF expression influences disease progression and immune evasion. The assay provides a sensitive and specific method for monitoring DAF in clinical and experimental settings, supporting biomarker development and therapeutic monitoring.