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Differential expression of ara genes depends on the presence of polygalacturonate. For qPCR measurement, RNA was isolated from the wild type (wt) or phoP mutant Pve cells grown in MMA, MMA with 0.5% arabinose (MMA + ara) or in MMA with 0.5% sodium polypectate (MMA + PGA). Mean values of relative expression levels with 95% confidence intervals are shown.
