Table 2.
Lac+ revertants often are the result of transposon loss and DNA amplification
| Strain | Transposon loss
|
DNA amplification
|
|
|---|---|---|---|
| Days 3–4 | Days 7–8 | Days 7–8 | |
| Wild-type Tn10 | 7% | 10% | 11% |
| (9/125) | (33/344) | (37/344) | |
| Tn Kan | — | 9% | 8% |
| — | (14/163) | (13/163) | |
Data are presented as percentage of transfer at indicated days after plating. Numbers in parentheses indicate number of Lac+ revertants that had lost or amplified the transposon/total number of revertants examined. Tn Kan, Tn10 containing the Kan resistance marker.