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Impact of pscA mutation on swarming motility. Five replicates of each strain were placed onto a single plate and examined after 16 h. (A) Photographs of representative swarm colonies. (B) Quantification of the lateral colony surface area in digital images of the colonies. Shown are means and standard errors from three independent experiments. GzLM analysis was performed, followed by Student’s t test (****, P < 0.001).
