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Violin plot of cell diameter in cultures of M. aeruginosa PCC 7806 grown in different concentrations of nitrate. Black horizontal bars represent mean diameter. Each measured cell is represented by a plotted point. Width of plot is proportional to frequency of cells at a given diameter. n = 4,890 (81 μM); n = 5,213 (323 μM). p-value from Mann–Whitney test.
