This product is lectin PNA labeled with our superior red fluorescent dye CF™568. Lectin PNA is specific for terminal β-galactose and binds preferentially to a commonly occurring structure, galactosyl (β-1,3) N-acetylgalactosamine. 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.