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Growth and SOD expression of the wild type and a cadA mutant after transition to LBS (pH 5.0) supplemented with lysine (15 mM). (A) Cell growth and pH curves of the culture broth of the wild type (⋄, ♦) and JR203 (○, •) without (open) or with (closed) lysine. Time points (1, 2, 4, and 6 h) to harvest cells for the assay of MnSOD expression are indicated. (B) Expression of cytosolic SODs and CAT activities from sodA::cat fusion in cells harvested at the time points indicated.
