Aleuria aurantia lectin (AAL) binds preferentially to fucose linked (α -1,6) to N-acetylglucosamine or to fucose linked (α -1,3) to N-acetyllactosamine-related structures, unlike Ulex europaeus and Lotus tetragonolobus lectins, which prefer (α -1,2)-linked fucose residues. AAL also reversibly binds fucose that is attached to nucleic acids.