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Growth characteristics of selected D. vulgaris mutants at elevated pH and sodium chloride concentrations with 50 mM Tris buffer. (A) pH 7.0 and 40 mM NaCl. (B) pH 7.9 and 40 mM NaCl. (C) pH 7.0 and 80 mM NaCl. (D) pH 7.9 and 80 mM NaCl. The data are the means of triplicate cultures, and the observed variability was within 10%. wt, wild type.
