The Role of Lectins in Blood Group Serology

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Abstract
Many lectins display blood group activity, and extracts from Dolichos biflorus (anti-A1), Ulex europaeus (anti-H), and Vicia graminea (anti-N) seeds provide an alternative to human sera as a source of blood-typing reagents. However, the major application of lectins in blood group serology undoubtedly lies in the recognition and elucidation of red celll polyagglutination. In this respect, lectins from Arachis hypogaea (anti-T/Tk), Salvia sclarea (anti-Tn). Salvia horminum (anti-Tn + Cad). Dolichos biflorus (anti-Tn/Cad) Glycine max, and the N-acetyl-D-glucosminyl-binding lectin, BS II (anti-Tk) from Bandeiraea simplicifolia seeds, provide an invaluable source of reagents for use in investigative immunohemotology. Because of their specific carbohydrate-binding properties, lectins have also been used as probes in studies on the topography of the red cell surface. This latter appliction has provided much information on the structure of the MN, T, and Tn red cell surface receptors and has aided in defining the red cell membrane abnormalities associated with certain uncommon phenotypes within the MN blood group system.

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