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Complementation of ptw-negative mutants. (A) Pierced onion bulb scale inoculated with strain K56-2 showing characteristic ptw activity. (B) Pierced onion bulb scale inoculated with B. cenocepacia ptw-negative mutant AE307 showing no ptw activity. (C) Pierced onion bulb scale inoculated with complemented AE307 (AE310) showing restored ptw activity.
