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β-Galactosidase activities expressed from xylA-lacZ in B. megaterium WH353 regulated by different CcpA mutants. Cells were grown in M9 medium with 0.5% succinate or with 0.5% succinate plus 0.2% glucose. The dotted line marks 50% of the wild-type (wt) expression with succinate. The amino acid substitutions in CcpA are shown under the respective columns.
