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Effect of a cagE mutation on IL-12p70 secretion by human dendritic cells infected with H. pylori. Supernatants were collected from triplicate wells 48 h after infection and assayed by ELISA. Error bars represent standard deviations. The difference in IL-12 production by cells infected with the wild-type strain compared to the cagE mutant is significant at P < 0.01 (t test)
