Used in immunological research to quantify levels of Membrane Cofactor Protein (CD46) in human biological samples such as serum, plasma, and cell culture supernatants. This ELISA kit enables researchers to study CD46 expression in the context of immune regulation, complement system activation, and host-pathogen interactions. It is particularly valuable in studies related to autoimmune diseases, infectious diseases (as CD46 serves as a receptor for several pathogens including measles virus and certain strains of Neisseria), and transplant immunology. The assay supports high-throughput analysis with high sensitivity and specificity, making it suitable for both clinical research and basic science investigations into cellular defense mechanisms.