Used in ELISA assays to detect and quantify specific proteins, peptides, or antibodies in biological samples. BSA serves as a blocking agent to prevent non-specific binding, improving assay accuracy. The kit enables researchers to measure biomarker levels in serum, plasma, or cell culture supernatants, supporting studies in immunology, disease diagnosis, and drug development. Widely applied in academic, clinical, and pharmaceutical research for its sensitivity and reliability in protein detection.