Used in immunological research to detect and quantify iC3b, a key complement system activation product. Helps assess complement-mediated immune responses in diseases such as autoimmune disorders, infections, and inflammatory conditions. Commonly applied in studies involving tissue damage, transplant rejection, and neurodegenerative diseases where complement activation plays a role. Enables researchers to monitor therapeutic interventions targeting the complement pathway. Suitable for use with serum, plasma, and other biological samples in laboratory settings.