Used in immunological research to quantify bovine complement component 4 (C4) levels in biological samples such as serum or plasma. This kit enables researchers to assess activation of the classical complement pathway in cattle, which is critical for studying immune responses to infections, inflammatory diseases, and vaccine efficacy. It is commonly applied in veterinary research, animal health studies, and diagnostics development for bovine diseases including mastitis, respiratory infections, and autoimmune conditions. The assay supports high-throughput analysis and provides a reliable tool for monitoring immune status in livestock.