TABLE 4.
acrAB, acrEF, and emrAB mutations did not increase inaA1::lacZ activity
| Strain | Relevant mutations | β-Galactosidase activity (MU) | Ratioa |
|---|---|---|---|
| N7918 | None | 16 (0.2)b | 1.0 |
| M2561 | tolC::Tn10 | 34 (1.3) | 2.1 |
| M4195 | emrAB::cat | 17 (0.3) | 1.1 |
| M4197 | tolC::Tn10, emrAB | 34 (0.2) | 2.1 |
| M4196 | acrEF::spc | 16 (1.2) | 1.0 |
| M2605 | None | 21 (3.1) | 1.0 |
| M2606 | acrAB::Tn903 | 25 (2.2) | 1.2 |
| N7881c | None | 28 (2.4) | 1.0 |
| M4807c | acrAB::Tn903 acrEF::spc | 28 (5.2) | 1.0 |
| M4820c | acrAB::spc | 33 (2.4) | 1.2 |
a
Ratio of the β-galactosidase activity (expressed in Miller units [MU]) in the mutant to the β-galactosidase activity in the corresponding wild-type strain.
b
The standard errors of the means are indicated in parentheses.
c
The strain was grown in LB broth with 0.2% glucose to repress expression of the chromosomal lacZ.