Fig. 9
Differences in proteolytic activity of secreted HtrA by several H. pylori strains. a Relative amount of secreted HtrAHp was measured by Western blotting using densitometric method. b Digestion of β-casein using supernatants from overnight grown H. pylori strains. The Coomassie-stained gel showed the result after 16 h incubation of reaction mixture. c The band intensities of β-casein were quantified densitometrically and sample without supernatant was set as a 100%. Significant differences were analyzed using Bonferroni test (p < 0.05 *, p < 0.01 ** and p < 0.001 ***). The standard error of mean (SEM) was calculated using at least three repetitions. ns means no significant differences