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Functional analysis of the novel DSF family signal. (A) DSF bioassay analysis of DSF-II. (B) Growth characteristics of X. campestris pv. campestris wild-type (WT) strain 8004 and DSF-negative mutant 8004dF in the absence or presence of DSF signals. (C) Addition of 5 μM DSF-II or DSF to cultures of 8004dF restored EPS production. The data shown are the means of the results of three repeats, and error bars indicate standard deviations.
