This product is prepared by labeling highly cross-adsorbed donkey anti-goat IgG (H+L) with CF™660C. CF™660C absorbs at 667 nm but can still be sufficiently excited by the 633 or 635 nm laser with emission at 685 nm in the borderline spectral region between far-red and near-IR fluorescence. CF™660C is several fold brighter and significantly more photostable than Alexa Fluor® 660. To minimize cross-reactivity, the antibody has been adsorbed against chicken, guinea pig, Syrian hamster, horse, human, mouse, rabbit, and rat serum. Please also see CF™660R, an even more photostable 660 nm dye ideal for confocal microscopy.Compatible with the NucleoCounter® NC-3000™.