This product is prepared by labeling highly cross-adsorbed donkey anti-human IgG (H+L) with our near-IR fluorescent dye CF680. CF680 is brighter than other spectrally similar dyes. Most importantly, antibody conjugates prepared from CF680 have by far the best signal-to-noise ratio than antibody conjugates prepared from other spectrally similar dyes. Please also check out our CF680R, an extremely photostable rhodamine-based near-IR dye. Please download the CF680 dye flyer for more details. To minimize cross-reactivity, the antibody has been adsorbed against bovine, chicken, goat, guinea pig, Syrian hamster, horse, mouse, rabbit, sheep and rat serum.