Ulex Europaeus Agglutinin I (UEA I), Unconjugated, 5 mg. UEA I binds to many glycoproteins and glycolipids containing alpha-linked fucose residues, such as ABO blood group glycoconjugates. This lectin preferentially binds blood group O cells and has been used to determine secretor status. It has been established as an excellent marker for human endothelial cells. Inhibiting/Eluting Sugar: 50–100 mM L-fucose