Table 1 Spontaneous induction of λ cI857 S7 prophage in E. coli cells cultivated in media supporting different growth rates
| Medium | Growth rate (doublings per hour) | Frequency of spontaneous prophage |
|---|---|---|
| induction (phages per cell)a | ||
| LB | 1.0 | 6.6 × 10-7 |
| M9GluCaa | 0.8 | 4.0 × 10-8 |
| M9Glu | 0.6 | < 1 × 10-9 |
| M9Gly | 0.4 | < 1 × 10-9 |
| M9Suc | 0.3 | < 1 × 10-9 |