TABLE 3.
Growth phenotypes of TbpB- and/or TbpA-defective M982 and B16B6 isogenic mutants with different iron sources
| Strain | Tbp produced | Growth observed after 24 h with:a
|
||
|---|---|---|---|---|
| Holo-hLF | Apo-hTf | Holo-hTf | ||
| M982 | TbpA+ TbpB+ | + | − | + |
| PMC205 | TbpA+ TbpB− | + | − | + |
| PMC206 | TbpA− TbpB+ | + | − | − |
| PMC207 | TbpA− TbpB− | + | − | − |
| B16B6 | TbpA+ TbpB+ | + | − | + |
| N16T2K | TbpA+ TbpB− | + | − | − |
| N16T1E | TbpA− TbpB+ | + | − | − |
| N16T12EK | TbpA− TbpB− | + | − | − |
a
Growth was determined by a disk diffusion assay. See Materials and Methods and reference 32. +, growth ≥2 mm surrounding the disk; −, no growth.