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Growth is dependent on pbpH expression in the absence of pbpA. The wild-type strain PS832 (⧫ and ◊) and the pbpA pbpH amyE::xylAp-pbpH strain DPVB207 (▪ and □) were grown in the presence of xylose and then centrifuged (at the time indicated by the arrow), resuspended at a 20-fold dilution, and incubated in medium containing (solid symbols) or lacking (open symbols) xylose. OD, optical density.
