Table 1. Bacterial strains and plasmids used in this study.
Kanr, Sper and Ermr: kanamycin, spectinomycin and erythromycin resistance, respectively.
| Strain or plasmid | Relevant characteristic | Source or reference |
| Strains | ||
| Strep. mutans UA159 | Wild-type, serotype c | Ajdić et al. (2002) |
| Strep. mutans OMZ175 | Wild-type, serotype f | Abranches et al. (2009) |
| Strep. mutans TW14D | Derivative of UA159, ΔbrpA (SMU.410), Ermr | Wen et al. (2006) |
| Strep. mutans TW14DC | TW14D carrying pDL278:brpA, Sper Ermr | Wen et al. (2006) |
| Strep. mutans TW251 | Derivative of UA159, Δpsr (SMU.787), Kanr | This study |
| Strep. mutans TW251C | TW251 carrying pDL278:psr, Kanr Sper | This study |
| Strep. mutans TW314 | Derivative of UA159, Δpsr, brpA-down, Kanr Ermr | This study |
| Strep. mutans TW316 | Derivative of OMZ175, Δpsr, Kanr | This study |
| Strep. mutans TW322 | Derivative of UA159, ΔrgpG, Sper | This study |
| E. coli DH10B | Cloning host, ΔmcrA ΔmcrBC Δmrr Δhsd | Invitrogen |
| Plasmids | ||
| pDL278 | Shuttle vector, Sper | LeBanc & Lee (1991) |
| pDL278:psr | Shuttle carrying psr, Sper | This study |