Used in immunological research to quantify mannose-binding lectin (MBL) levels in human serum, plasma, or other biological samples. Helps assess MBL deficiency, which is linked to increased susceptibility to infections, especially in immunocompromised individuals. Widely applied in clinical studies investigating autoimmune diseases, transplant rejection, and neonatal infections. Supports research on the role of MBL in innate immunity and complement system activation. Provides a reliable, high-throughput method for screening MBL concentrations in large population studies.