Table I.
Characteristics of H. pylori cagY MRR Direct DNA Repeat Sequences and Their Recombination Potential a
| Repeat sequencesb
|
Recombination potentialc
|
||||
|---|---|---|---|---|---|
| H. pylori strain | Total number(independent) | Mean ± SDcopies | Mean ± SD size(bp) | Number ofregionsd | Range in fragment size (bp) |
| 26695 | 302 (99) | 3.1 ± 1.6 | 36.1 ± 22.8 | 443 | 111–2,187 |
| J99 | 235 (78) | 3.0 ± 1.7 | 48.2 ± 42.7 | 347 | 114–2,205 |
| NCTC11638 | 255 (82) | 3.1 ± 2.0 | 34.9 ± 23.5 | 425 | 114–2,544 |
a
The MRR of cagY in the three strains are shown in Fig. 1.
b
≥16 nucleotides (refer to Materials and Methods).
c
Recombination potential defined as number of regions flanked by direct DNA repeats, and fragment size as intervening segment plus one repeat.
d
All potential recombination events involving the 1,215 regions identified (leading to either DNA deletion or duplication) result in in-frame ORF (P < 0.001).