FIG. 3.

Restoration of the wild-type phenotype in a P. aeruginosa PA14 gidA mutant. Wild-type (WT) and gidA mutant (gidA) strains were supplied with a plasmid expressing gidA from P_BAD (pCF430G) or with empty vector (pCF430). Cultures were grown in the presence of 50 mM arabinose to induce gene expression. (A) LasA activity. (B) Pyocyanin production. Values are means from three independent biological experiments, normalized to culture density (OD₆₀₀) and expressed as percentages of the wild-type value. Error bars indicate ±1 standard deviation.