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Summary of disc diffusion growth assays, demonstrating which strains were able to use enterobactin under iron-limited conditions (n ≥ 2)
| Strain | Gene function | Growth |
|
|---|---|---|---|
| With enterobactin (near disc) | Without enterobactin (far from disc) | ||
| Wild type | + | + | |
| feuA | Siderophore uptake | − | − |
| dhbA | Bacillibactin biosynthesis | + | − |
| ybbA | Putative esterase | + | + |
| dhbA ybbA | See above | − | − |
