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Effect of grvR deletion on adherence to collagen IV (A) and biofilm (B). Values for OG1RF were considered 100%, and the relative activities for the other strains are shown. Mean OD570s of OG1RF were 1.048 (A) and 1.733 (B). Bars represent the means and standard deviations from two independent experiments representing six wells for each strain. BSA was used as a control for adherence. P values are for comparison versus OG1RF.
