Polyclonal anti-RFP is designed to detect red fluorescent protein (RFP) and its variants. This product is prepared by labeling high quality polyclonal rabbit anti-RFP IgG (H+L) with the far red fluorescent dye CF™660R. CF™660R absorbs at 663 nm but can still be sufficiently excited by the 633 or 635 nm laser with emission at 682 nm in the borderline spectral region between far-red and near-IR fluorescence. CF™660R is significantly brighter than the spectrally similar Alexa Fluor® 660. More importantly, CF™660R is extremely photostable, making the dye ideal for confocal microscopy. To minimize cross-reactivity, the antibody has been adsorbed against human, mouse and rat serum.