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| Strain | Description | Source or reference |
|---|---|---|
| Escherichia coli W3110 | Wild-type strain | CGSC 4474 |
| ZK126 | W3110 Δlac U169 tna2, parent of ZK819 | 5 |
| ZK819 | ZK126 rpoS819; evolutionary ancestor of SCV and LCV | 5 |
| Large colony variant (LCV) | Evolved strain, colony size comparable to wild-type strain, rpoSWT icdH366H | This study |
| Small colony variant (SCV) | Evolved strain, small colony size, rpoS92 rpoCA494V | This study |
