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Expression profiles of of Φ(ulaG-lacZ) and Φ(ulaA-lacZ) transcriptional fusions in strain JA134 growing anaerobically in l-ascorbate. At intervals, the A600 of strain JA134 bearing Φ(ulaG-lacZ) (open squares) or Φ(ulaA-lacZ) (open circles), as well as the β-galactosidase activities of the corresponding cultures (solid squares and circles, respectively), were measured. OD, optical density.
