Determination of genes implicated in partial resistance to G2cps. Biofilm ratio of WT TG1-c, mutants C, D, E, L, and Z partially resistant to G2cps, and transduction mutants with either a single deletion or multiple deletions made according to the different insertion points of both Tn and Mu within the genomes of mutants D (A), L (B), C (C), and Z (D). ***, P ≤ 0.005; N.S., not significant. P values were determined by comparison to both the WT biofilm ratio (black) and the C, D, L, or Z mutant biofilm ratio (gray).