Used in immunological research to quantitatively measure complement component C5 levels in biological samples such as serum or plasma. Enables study of complement system activation in inflammatory diseases, autoimmune disorders, and infectious conditions. Supports evaluation of therapeutic interventions targeting the complement pathway, including drug development for conditions like paroxysmal nocturnal hemoglobinuria, age-related macular degeneration, and sepsis. Provides a reliable, high-throughput method for detecting C5 concentration in human samples, aiding both clinical research and laboratory investigations.