FIG 2.

Effects of alteration of the artificial substrate on H. pylori biofilm adherence. H. pylori strains G27 (A), PRINTER: this does not look like the standard uppercase Greek delta; please use standard delta as usual ΔarsS mutant (B), and ArsR-D52N mutant (C) were grown in 24-well plates with different surface properties: untreated polystyrene plate, poly-d-lysine-treated plate, and tissue culture-treated plate. The mean OD₅₉₀ values for solubilized crystal violet, which are representative of the density of the biofilm, are shown; error bars show standard errors of the means. Each graph represents three biologically independent experiments. *, P < 0.05; **, P < 0.01; ***, P < 0.001; ****, P < 0.0001.