FIG 4 .

Example images of mucin-promoted surface motilities of PA14 WT and a fliC flagellar mutant (A), a chpB type IV pilus mutant (B), a fliC pilA flagellar and type IV pilus double mutant (C), a rhlI quorum-sensing mutant with and without addition of C4-HSL (D), and a lasI quorum-sensing mutant with and without addition of 3-oxo-C12-HSL (E). P. aeruginosa bacteria were spotted onto MSCFM plates with 0.3% agar and 0.4% mucin and incubated at 37°C for 13 h. For surface motility restoration, 10 µM of either C4-HSL or 3-oxo-C12-HSL was added.