CF™770 succinimidyl ester (CF™770 SE) is an amine-reactive, near-IR fluorescent dye. Upon conjugation to protein, the dye has an absorption peak at 770 nm and emission peak at 797 nm. CF™770 is significantly brighter and more photostable than dyes of similar wavelengths from other suppliers. Because the long wavelength fluorescence of CF™770 has excellent tissue penetration, the dye is ideal for in vivo imaging. Like our other near IR CF™ dyes, another unique feature of CF™770 is that the dye is engineered to be minimally immunogenic. As a result, antibodies labeled with the dye are expected to have improved in vivo half-life. Biotium also offers CF™770 VivoBrite labeling kit for small animal in vivo imaging (cat #92162).