This product is wheat germ agglutinin (WGA) labeled with our our superior red fluorescent dye CF™568. WGA is a carbohydrate-binding lectin that has high affinity for sialic acid and N-acetylglucosamine. Thus, fluorescent WGA conjugates can be used to stain glycoproteins that have these sugar moieties. WGA also stains the bud scars in budding yeast. CF™568 has an excitation spectrum optimally matching the 568 nm line of the Ar-Kr mixed-gas laser. Protein conjugates of the dye are much brighter than those of Alexa Fluor® 568. In addition, the photostability of CF™568 is superior to that of Alexa Fluor® 568, making CF™568 a much better choice for demanding applications, such as confocal microscopy and single molecule imaging.