Table 1. Strains used in this study.
| Strain | Relevant genotype | Source or reference |
| S. mutans | ||
| UA159 | Wild-type | Laboratory stock |
| JL1 (ΔclpP) | clpP : : NP (non-polar) Kan | Kajfasz et al. (2009) |
| JL2 (ΔclpX) | clpX : : NPKan | Kajfasz et al. (2009) |
| JL29 | UA159+pMSP3535 | This study |
| JL30 (ΔclpP complement) | JL1+pMSP3535 expressing clpP | This study |
| JL31 (ΔclpX complement) | JL2+pMSP3535 expressing clpX | This study |
| JL26 (Δglg region) | glgB glgC glgD : : Erm | This study |
| JL27 (ΔclpP/Δglg region) | clpP : : NPKan; glg : : Erm | This study |
| JL28 (ΔclpX/Δglg region) | clpX : : NPKan; glg : : Erm | This study |
| Other species | ||
| L. lactis ATCC 11454 | Wild-type | Laboratory stock |
| S. gordonii DL-1 | Wild-type | Laboratory stock |