Flamma® 648 Alkyne, Cat. No.: PWK1215_1 mg, Excitation/Emission Max.(nm): 648/663 nm, Storage conditions: -20 ℃, protect from light. Flamma® Fluors 648 Alkyne is a copper (I)-catalyzed azide-alkyne cycloaddition (CuAAC) reagent of far-red dye induced from cyanine structure and used to generate a stable fluorescence signal in bioimaging. The maxima of Ex/Em values are at 648/663 nm, similar to that of Alexa 647, Cy5 and DyLight 650. Flamma 648 might be excited using 593 or 633 nm laser lines and displays excellent optical property. Flamma 648 alkyne couples with an azide to form 1,4-disubstituted 1,2,3-triazole inside of living systems without interfering native biochemical processes. Prior to perform CuAAC, the azide functionality should be introduced onto counterpart biomolecule by means of chemical or genetic modification. We offer Flamma Fluors 648 alkyne as a click chemistry reagent dye for cellular imaging and nucleotide functionalization.