Table 2.
H. pylori strains | Donor DNA |
|
---|---|---|
rpoB3 (330 bp) | acnB:Kan (2.5 kb) | |
X47 WT | 2.56 ± 0.38 × 10−4 | 7.20 ± 0.84 × 10−6 |
X47 recR::cat | 3.25 ± 0.76 × 10−4 | 5.60 ± 0.32 × 10−6 |
X47 recO::aphA | 3.04 ± 0.82 × 10−4 | ND |
X47 addA::cat recO::aphA | 2.13 ± 0.68 × 10−5 | ND |
X47 addA::cat | 3.09 ± 0.62 × 10−5 | 2.90 ± 0.30 × 10−7 |
The transformation frequencies are presented as the number of transformants (resistant colonies) per recipient cell. Data are means ± standard errors from three independent determinations. ND: When a strain contains a KanR marker (aphA gene), the transformation frequency with acnB:Kan cannot be determined.