Figure 4

EPS staining of S. mutans normal and persister biofilms. (a) EPS staining images of S. mutans normal and persister biofilms; (b) Quantitative analysis of EPS/bacteria biomass and ratio. Results are averaged from five randomly selected positions of each sample, ***P<0.001. (c) Relative gene expression of EPS production-related genes. The data are presented as the mean±standard deviation (n=6), ***P<0.001. DMADDM, dimethylaminododecyl methacrylate.