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By using absorption and fluorescence spectroscopy, we compared the effects of heat and light treatments on the phycobilisome (PBS) antenna of Synechocystis sp. PCC 6803 cells. Fluorescence emission spectra obtained upon exciting predominantly PBS, recorded at 25 °C and 77 K, revealed characteristic changes upon heat treatment of the cells. A 5-min incubation at 50 °C, which completely inactivated...
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