XFD647 maleimide *C2, XFD647 Same Structure to Alexa Fluor(TM) 647*

Molecular weight: 1095.15. Excitation (nm): 650. Emission (nm): 671. Extinction coefficient (cm-1 M-1): 270000. Quantum yield: 0.33. XFD647 is manufactured by AAT Bioquest, and it has the same chemical structure of Alexa Fluor(R) 647 (Alexa Fluor(R) is the trademark of ThermoFisher). It is a bright red-fluorescent dye optimal for use with the frequency-doubled He-Ne laser line. XFD647 dye is water soluble and pH-insensitive from pH 4 to pH 10. The maleimide of XFD647 is the most convenient thiol-reactive form for conjugating this dye to a protein or antibody.