Used in immunological research to quantify levels of complement fragment C5a in biological samples. Helps assess activation of the complement system, which plays a key role in inflammation and immune response. Commonly applied in studies related to inflammatory diseases, sepsis, autoimmune disorders, and tissue injury. Enables researchers to evaluate the effectiveness of therapeutic agents targeting complement-mediated pathways. Suitable for use with serum, plasma, and cell culture supernatants in laboratory settings.