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Effects on citB expression of citrate synthase, aconitase, and spo0A mutations. Cultures were grown in DS medium, and β-galactosidase activity was measured in samples harvested at various time points during growth. Arrows indicate the end of the exponential growth phase. (A) Strains: AF21 (wild type [wt]), HKB76 (citA citZ), HKB165 (citB), and HKB166 (citA citZ citB). (B) Strains: AF21 (wild type), HKB168 (spo0A), HKB165 (citB), HKB169 (citB spo0A), and HKB170 (citA citZ citB spo0A).
