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Growth sensitivity to oxygen
| Strain | Growtha at O2 concn (%) of:
|
||||
|---|---|---|---|---|---|
| 2 | 5 | 7.5 | 10 | 12 | |
| Wild-type X47 | ++ | ++ | ++ | ++ | ++ |
| napA mutant X47 | ++ | + | ± | − | − |
Cells were inoculated onto plates and incubated under different concentrations of oxygen as indicated, and growth was scored after 2 days as follows: ++, healthy growth; +, slow growth; ±, slight growth at the site of heaviest inoculum; −, no growth at all. The experiments were repeated three times with similar results.
