R-Phycoerythrin (RPE) is one of the most common reporter proteins used in Flow Cytometry and Luminex® or other bead based applications. With an extremely high absorbtivity, a high quantum efficiency, a large Stokes shift and excitation and emission bands at visible wavelengths. It is a stable protein which can be easily linked to antibodies and other proteins by conventional protein cross-linking techniques without altering its spectral characteristics.
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