Used as a reference standard in research and diagnostic applications to detect and study the CD46 protein, which plays a key role in regulating the complement system and protecting cells from immune attack. Commonly applied in flow cytometry, immunohistochemistry, and Western blotting to identify CD46 expression on cell surfaces, such as leukocytes and epithelial cells. Also utilized in immunotherapy development, particularly in studies involving viral entry mechanisms, as CD46 acts as a receptor for several pathogens including measles virus and adenoviruses. Supports the development of targeted therapies, monitoring of immune responses in autoimmune diseases and cancer, and serves as a benchmark for evaluating the performance and specificity of new monoclonal antibodies in biopharmaceutical research.