TABLE 4.
Effect of an hns mutation on fimB and fimE expression compared to expression in a wild-type strain
| Strain | Plasmid | pH | Added NaCl concn (mM) | β-Galactosidase activity (Miller units) |
|---|---|---|---|---|
| RR1 | pJB5A (fimB-lacZ) | 5.5 | 0 | 258 ± 30 |
| RR1 | pJB5A | 5.5 | 400 | 236 ± 26 |
| RR1 | pJB5A | 7.0 | 0 | 352 ± 12 |
| RR1 | pJB5A | 7.0 | 400 | 307 ± 90 |
| RR1 bglY (hns) | pJB5A | 5.5 | 0 | 534 ± 18 |
| RR1 bglY | pJB5A | 5.5 | 400 | 486 ± 15 |
| RR1 bglY | pJB5A | 7.0 | 0 | 453 ± 123 |
| RR1 bglY | pJB5A | 7.0 | 400 | 698 ± 156 |
| RR1 | pJLE4-3 (fimE-lacZ) | 5.5 | 0 | 139 ± 13 |
| RR1 | pJLE4-3 | 5.5 | 400 | 176 ± 26 |
| RR1 | pJLE4-3 | 7.0 | 0 | 294 ± 40 |
| RR1 | pJLE4-3 | 7.0 | 400 | 318 ± 37 |
| RR1 bglY (hns) | pJLE4-3 | 5.5 | 0 | 151 ± 27 |
| RR1 bglY | pJLE4-3 | 5.5 | 400 | 190 ± 13 |
| RR1 bglY | pJLE4-3 | 7.0 | 0 | 313 ± 34 |
| RR1 bglY | pJLE4-3 | 7.0 | 400 | 336 ± 27 |