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β-Galactosidase activities of Φ(ulaA-lacZ), Φ(ulaG-lacZ), and Φ(yiaK-lacZ) transcriptional fusions in the K. pneumoniae strain ATCC 13882 genetic background. Cells were grown under aerobic or anaerobic conditions with CAA (open bars), l-ascorbate (black bars), or l-ascorbate plus glucose (gray bars). The bars indicate means, and the error bars indicate standard deviations.
