TABLE 4.
Mutability (mutants per 108 cells) of dgt strains in dinB genetic backgrounda
| Genotype | lac G·C→C·G | lac G·C→T·A | lac A·T→G·C |
|---|---|---|---|
| Wild type | 0.02 ± 0.02 | 2.4 ± 0.2 | 0.02 ± 0.02 |
| dinB | 0.02 ± 0.02 | 1.1 ± 0.1 | 0.02 ± 0.02 |
| dgt | 0.35 ± 0.1 | 1.1 ± 0.1 | 0.55 ± 0.1 |
| dinB dgt | 0.20 ± 0.1 | 0.55 ± 0.1 | 0.3 ± 0.1 |
a
The wild-type strains used were NR16944, NR16945, and NR16947 for the three lac reversions, respectively; the dinB strains were NR17040, NR17041, and NR17042; the dgt strains were NR16950, NR16951, and NR16953; and the dinB dgt strains were NR17044, NR17045, and NR17046 (Table 1). The lac gene in these strains resides on F′prolac.