Used in biomedical research to measure levels of coagulation factor X in rat plasma or serum samples. Helps in studying blood clotting mechanisms, evaluating coagulation disorders, and assessing the effects of anticoagulant or procoagulant drugs in preclinical studies. Commonly applied in pharmacology, hematology, and toxicology research to monitor changes in the coagulation cascade, especially in animal models of liver disease, thrombosis, or hemorrhage. Provides a sensitive and specific method for quantifying factor X activity indirectly through antigen detection, supporting data interpretation in experimental models.