TABLE 2.
Parameters of growth of a ΔrpoE mutant strain in the presence of metal cations in liquid culturea
| Metal added and concn (mm) | Wild type
|
ΔrpoE mutant
|
ΔrpoE λatt::rpoE RseAB mutant
|
|||
|---|---|---|---|---|---|---|
| td (min) | tl (min) | td (min) | tl (min) | td (min) | tl (min) | |
| None | 38 ± 3 | 25 ± 11 | 35 ± 4 | 70 ± 28 | 41 ± 9 | 94 ± 69 |
| CuCl2 (2) | 42 ± 7 | 27 ± 28 | 52 ± 6 | 301 ± 47 | 55 ± 11 | 58 ± 40 |
| ZnCl2 (0.7) | 46 ± 7 | 36 ± 19 | 72 ± 8 | 288 ± 18 | (47) | (487) |
| CdCl2 (0.2) | 50 ± 8 | 68 ± 19 | 55 ± 1 | 612 ± 12 | (76) | (478) |
a
The mean values of three experiments performed in LB medium are shown with standard deviations except that single values are from are experiment. td, doubling time during the exponential phase of growth; tl, time of lag phase.