Table 4.
Effect of excision protein deletions on the transfer frequency of pLYL72a
| Plasmid used with donor strain BT4001 ΩQABC pLYL72 | Transfer frequency of pLYL72 |
Regulation of transferb | Source or reference | |
|---|---|---|---|---|
| +Tc | −Tc | |||
| pLYL05 | 10−5–10−6 | 10−5–10−6 | E−, R− | 5 |
| pKS04 | 10−5–10−6 | 10−5–10−6 | E−, R− | 5 |
| pGW46 | 5.5 × 10−3 | <10−9 | E+, R+ | This study |
| pGRW53Δ2c | 1.8 × 10−4 | <10−9 | E−, R+ | This study |
| pGRW53Δ2d | <10−9 | <10−9 | R+, R+ | This study |
| pGRW53ΔExc | 1.2 × 10−3 | <10−9 | E+, R+ | This study |
| pYS41 | <10−9 | <10−9 | R+, R+ | This study |
| Ω2.6pGERM | <10−9 | <10−9 | R+, R+ | This study |
a
The transfer frequency of pLYL72 is expressed as the average ratio of the number of transconjugants per recipient cell. +, present; −, absent.
b
E, enhancer; R, repressor.