abo 138

The ABO System. rtpzeus 138 The ABO system is based on the expression of genetically determined A, B and H blood group antigens on the surface of different cell types, including red blood cells (RBCs), endothelial cells and kidney parenchymal cells 11 Blood group O is determined by the antigen H, an oligosaccharide produced by the enzyme α-1,2-fucosyltransferase which is able to add a fucose molecule on