Used in diagnostic assays to detect the presence of the Rhesus D (RhD) antigen on red blood cells, aiding in blood typing and preventing hemolytic disease of the newborn. Employed in prenatal testing and transfusion medicine to identify RhD-positive or RhD-negative status. Also utilized in research settings to study red blood cell surface markers and immune responses related to the Rh blood group system. Helps ensure compatibility in blood transfusions and supports the development of immunoprofylaxis strategies in RhD-negative individuals.