This product is wheat germ agglutinin (WGA) labeled with our orange-red fluorescent CF555. 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. CF555 is particular useful for labeling antibodies with results superior to those obtained with Alexa Fluor® 555 SE or Cy®3 SE. The absorption and emission spectra of CF™555 are similar to those of Alexa Fluor® 555 or Cy®3.