XFD700 NHS Ester *Same Structure to Alexa Fluor(TM) 700 NHS Ester*

Molecular weight: ~1400. Excitation (nm): 696. Emission (nm): 719. Extinction coefficient (cm-1 M-1): 205000. Quantum yield: 0.25. XFD700 is manufactured by AAT Bioquest, and it has the same chemical structure of Alexa Fluor(R) 700 (Alexa Fluor(R) is the trademark of ThermoFisher). It is a bright red fluorescent dye. XFD700 dye is water soluble and pH-insensitive from pH 4 to pH 10. The NHS ester (or succinimidyl ester) of XFD700 is the most convenient amine-reactive form for conjugating this dye to a protein or antibody.