Used in immunological research to detect and quantify complement component 4b (C4b) in rat samples, this ELISA kit helps assess activation of the classical complement pathway. It is commonly applied in studies related to inflammation, autoimmune diseases, and immune complex-mediated conditions in rodent models. The assay enables researchers to monitor changes in C4b levels in serum, plasma, or tissue homogenates, supporting investigations into disease progression, therapeutic interventions, and immune system function. Its high sensitivity and specificity make it suitable for preclinical research in pharmacology, immunology, and biomedical sciences.