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Growth curves of (a) FS and (b) SS in the evolution environment. Four hours and 30 min after inoculation (indicated by the arrow), aeration and carbon content of the cultures were manipulated. Dotted lines and open symbols indicate extra aeration, and continuous lines and solid symbols indicate no extra aeration. Circles indicate that no carbon source was added after 4 hr and 30 min, squares indicate acetate addition, and diamonds indicate glucose addition.
