CF640R α-bungarotoxin conjugate is α-bungarotoxin labeled with our superior far-red fluorescent dye CF640R. α-Bungarotoxin is a polypeptide snake toxin that has high affinity for the nicotinic receptor at the neuromuscular junction. CF640R dye is brighter and far more photostable than Alexa Fluor? 647 when excited by the 633 or 635 nm laser. Download the CF640R flyer for more information.