Fig. 2. Adhesion strength of vegetative gbpD^– and GbpD^OE cells. The percentage of cells that became detached upon shaking of the culture dish at 150 rpm is plotted against the time of shaking. Symbols indicate the wild type (x), gbpD^– (x) and gbpD^– /GbpD ^OE cells (x). Error bars represent the s.d. of three independent experiments.