R-Phycoerythrin (R-PE)

R-Phycoerythrin (R-PE) is an intensely bright phycobiliprotein isolated from newly identified red algae species exclusive to the coastal region of Taiwan. It exhibits extremely bright red-orange fluorescence with high quantum yields, and generates fluorescence signals far stronger than other commonly-seen organic and synthetic fluorophores. This product is supplied with 50% ammonium sulfate for longer-term storage. The ammonium sulfate is used to increase the fluorescent protein's quality and avoid protein degradation, however, this must be removed by buffer exchange before use.