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Release of the intracellular potassium ions from desiccation-adapted S. Tennessee (A) and S. Eimsbuettel (B) in the presence of 0 to 64 μg/ml paenibacterin (P) and 10 μg/ml polymyxin, measured as changes in fluorescence at 505 nm. Each data point represents the average of three repeats. A significant difference between averages for paenibacterin-treated and untreated cells after 500 s of the assay is indicated by an asterisk (*).
