This product is prepared by labeling highly cross-adsorbed donkey anti-human IgG (H+L) with our near-IR fluorescent dye CF770. CF770 is brighter than other spectrally similar dyes. Most importantly, antibody conjugates prepared from CF770 have by far the best signal-to-noise ratio than antibody conjugates prepared from other spectrally similar dyes. To minimize cross-reactivity, the antibody has been adsorbed against bovine, chicken, goat, guinea pig, Syrian hamster, horse, mouse, rabbit, sheep and rat serum.