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Dark adapted cells of 6F14 and 4A+ were shifted to different light intensities in this experiment. The mean cell density (cells/ml) and the Chlorophyll (Chl) content (nmol Chl per cell) are shown below the culture flasks in red and black numbers, respectively. For each light condition, experiments were performed on three biological replicates of each strain. Statistical error (±SD) was ≤ 10%.
