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Single-protein study of photoresistance of pigment–protein complex in lipid bilayer

Single-protein study of photoresistance of pigment–protein complex in lipid bilayer,10.1016/j.cplett.2011.06.019,Chemical Physics Letters,Daisuke Uchi

Single-protein study of photoresistance of pigment–protein complex in lipid bilayer  
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Daisuke Uchiyama, Hajime Hoshino, Kohei Otomo, Taro Kato, Ken-Ichi Onda, Akira Watanabe, Hiroyuki Oikawa, Satoru Fujiyoshi, Michio Matsushita, Mamoru Nango, Natsuko Watanabe, Ayumi Suminohttp://academic.research.microsoft.com/io.ashx?type=5&id=49296754&selfId1=0&selfId2=0&maxNumber=12&query=
Photoresistance of a pigment-binding membrane protein, light-harvesting 2 (LH2) complex from the photosynthetic bacterium, Rhodopseudomonas acidophila, was investigated by fluorescence of single LH2 complexes at a temperature of 296K. Before irreversibly stopping fluorescence, a single LH2 complex in phospholipid bilayer of dimyristoylphosphatidylcholine (DMPC) emitted on average 4 times more fluorescence photons than a complex in detergent micelle of octylglucopyranoside (OG). Fluorescence-excitation spectrum of single LH2 complexes taken at 5K showed that the LH2 complex is structurally less perturbed in DMPC bilayer than in OG micelle, suggesting that structural instability reduces photoresistance of LH2.
Journal: Chemical Physics Letters - CHEM PHYS LETT , vol. 511, no. 1, pp. 135-137, 2011
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