a green fluorescent protein with photoswitchable emission from the deep sea绿色荧光蛋白与photoswitchable从深海排放.pdfVIP

a green fluorescent protein with photoswitchable emission from the deep sea绿色荧光蛋白与photoswitchable从深海排放.pdf

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a green fluorescent protein with photoswitchable emission from the deep sea绿色荧光蛋白与photoswitchable从深海排放

A Green Fluorescent Protein with Photoswitchable Emission from the Deep Sea 1 1 2 1 3 4 Alexander Vogt , Cecilia D’Angelo , Franz Oswald , Andrea Denzel , Charles H. Mazel , Mikhail V. Matz , 5 5,6 ¨ 1,7 Sergey Ivanchenko , G. Ulrich Nienhaus , Jorg Wiedenmann * 1 Institute of General Zoology and Endocrinology, University of Ulm, Ulm, Germany, 2 Department of Internal Medicine I, University of Ulm, Ulm, Germany, 3 NightSea, Andover, Massachusetts, United States of America, 4 Integrative Biology, University of Texas in Austin, Austin, Texas, United States of America, 5 Institute of Biophysics, University of Ulm, Ulm, Germany, 6 Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America, 7 National Oceanography Centre, University of Southampton, Southampton, United Kingdom Abstract A colorful variety of fluorescent proteins (FPs) from marine invertebrates are utilized as genetically encoded markers for live cell imaging. The increased demand for advanced imaging techniques drives a continuous search for FPs with new and improved properties. Many useful FPs have been isolated from species adapted to sun-flooded habitats such as tropical coral reefs. It has yet remained unknown if species expressing green fluorescent protein (GFP)-like proteins also exist in the darkness of the deep sea. Using a submarine-based and -operated fluorescence detection system in the Gulf of Mexico, we discovered ceriantharians emitting bright green fluorescence in depths between 500 and 600 m and identified a GFP, named cerFP505, with bright fluorescence emission peaking at 505 nm. S

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