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Siderophore secretion by strains with various levels of TonB expression
| Strain/plasmid | Relative TonB level | Mean cleared zone diam (mm) ± SD |
|---|---|---|
| KP1402/pACYC184 | 0.0 | 13 ± 0.5 |
| KP1033/pACYC184 | 1.0 | No zone |
| KP1413/pACYC184 | 1.0 | No zone |
| KP1402/pKP325 | 0.13 | 12 ± 0.0 |
| KP1407/pKP325 | 0.004 | 13 ± 0.0 |
| KP1402/pKP299 | 8.0 | 10 ± 0.5 |
