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Growth and expression profiles of an fbsA-lacZ transcriptional fusion in the S. agalactiae strains O90R and ΔoppB. The bacteria were grown aerobically in THY liquid medium, and at various time points, samples were withdrawn for the determination of β-galactosidase activity (A) and OD600 (B) of the culture. β-Galactosidase activity was expressed in Miller units.
