Wheat germ agglutinin (WGA) is one of the most widely used lectins in cell biology. Our Alexa Fluor® 633 conjugate of WGA exhibits the far-red fluorescence of the Alexa Fluor® 633 dye (excitation/emission maxima ~632/647 nm). Alexa Fluor® 633 WGA binds to sialic acid and N-acetylglucosaminyl residues.