Used in immunological research to quantify complement protein 3 (C3) levels in rat serum, plasma, or tissue samples. This kit enables researchers to assess activation of the complement system in studies related to inflammation, autoimmune diseases, and immune response mechanisms. It is commonly applied in preclinical studies involving animal models of infection, sepsis, kidney disease, and neurodegenerative disorders. The assay supports high sensitivity and specificity in detecting C3 concentration changes, aiding in the evaluation of disease progression and therapeutic interventions.