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The core light-harvesting complex B875 isolated from the purple bacterium Rubrivivax gelatinosus and its different spectral forms B820 and B840, which are depleted of carotenoid, were investigated by steady-state and time-resolved fluorescence, and by electron microscopy. Images of B875 have been shown to contain cyclic oligomers with a diameter of 150–200 Å and with a central hole of 25 Å [Jirsakova...
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