FIG. 4.

Diameters of swimming motility of complemented mutants of CFT073 fim L-ON as well as mutants carrying the vector plasmid only. The + and − signs indicate mutants transformed with the complementation plasmid and the vector plasmid, respectively. Data represent the averages of three separate experiments. Error bars represent the SEM. Significant differences in motility between complemented mutants and mutants carrying the vector plasmid were determined using a paired Student t test. #, P < 0.05; *, P < 0.01.