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Effect of cell growth rate on fumarase activity in a cya mutant strain. (A) Cells were grown in glucose (2.25 mM) minimal medium at the indicated growth rates. The oxygen level was 1%. (B) Cells were grown at 21% O2. Total fumarase activity (●), FumA+B activity (○), and FumC activity (▴) in the cya mutant strain were determined.
