{"refrec":{"BRefID":392465,"RR":"<b>Lee, H.; Han, T.; Park, J.</b> (2024). Purified <i>Pyropia yezoensis</i> pigment extract-based tandem dye synthesis. <i>Mar. Drugs 22(5)</i>: 197. <a href=\"https://dx.doi.org/10.3390/md22050197\" target=\"_blank\">https://dx.doi.org/10.3390/md22050197</a>","BEntID":390227,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Mar. Drugs 22(5)</i>: 197. <a href=\"https://dx.doi.org/10.3390/md22050197\" target=\"_blank\">https://dx.doi.org/10.3390/md22050197</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Lee, H.; Han, T.; Park, J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Lee, H.; Han, T.; Park, J.","Englishabstract":"Red phycoerythrin (R-PE) is a highly valuable protein found in an edible seaweed, Pyropia yezoensis. It is used extensively in biotechnological applications due to its strong fluorescence and stability in diverse environments. However, the current methods for extracting and purifying R-PE are costly and unsustainable. The aim of the present study was to enhance the financial viability of the process by improving the extraction and purification of R-PE from dried P. yezoensis and to further enhance R-PE value by incorporating it into a tandem dye for molecular biology applications. A combination of ultrafiltration, ion exchange chromatography, and gel filtration yielded concentrated (1 mg·mL<sup>–1</sup>) R-PE at 99% purity. Using purified PE and Cyanine5 (Cy5), an organic tandem dye, phycoerythrin-Cy5 (PE-Cy5), was subsequently established. In comparison to a commercially available tandem dye, PE-Cy5 exhibited 202.3% stronger fluorescence, rendering it suitable for imaging and analyzes that require high sensitivity, enhanced signal-to-noise ratio, broad dynamic range, or shorter exposure times to minimize potential damage to samples. 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