Table 1 Transformation efficiency in DNA repair mutants.

From: ComB proteins expression levels determine Helicobacter pylori competence capacity

strain genotype

n a

transformation frequency (×10−4) b median (min; max)

Relative value

P value (MWU)

wt

31

3.9 (0.3; 26)

1

 

∆addA

8

19.0 (5; 93)

4.9

0.0009

∆recO

11

24.7 (0.9; 114)

6.3

<0.0001

∆recN

7

10.9 (6; 31)

2.8

0.0003

∆polA

6

2.2 (0.3; 8)

0.6

0.1231

∆mutY

4

7.7 (0.3; 12)

2.0

0.3759

∆comB6

3

ND

0

 
  1. aNumber of independent determinations (from 3 replicates mean in each experiment).
  2. bTransformation tests were performed with genomic DNA conferring Streptomycin resistance (see Methods). The frequencies were calculated as the number of StrR colonies per recipient CFU. Median are indicated; (min; max) correspond respectively to the minimum and the maximum values observed for each strain.
  3. ND (Non Detected)MWU, Mann-Whitney U test between wt and the mutants.
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