UEA I binds to glycoproteins and glycolipids containing α-linked fucose residues, such as ABO blood group glycoconjugates. The lectin is an established marker for human endothelial cells and has been used to differentiate between angiosarcomas and epithelial tumors. Biotium offers UEA I conjugated to biotin and a selection of 5 bright and photostable CF® Dyes.