CF568 α-bungarotoxin conjugate is α-bungarotoxin labeled with our superior red fluorescent dye CF568. α-bungarotoxin is a polypeptide snake toxin that has high affinity for the nicotinic receptor at the neuromuscular junction. CF568 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 CF568 is superior to that of Alexa Fluor? 568, making CF568 a much better choice for demanding applications, such as confocal microscopy and single molecule imaging.