Comparative genomics of the restriction-modification systems in <i>Helicobacter pylori</i>

Abstract excerpt

Helicobacter pylori is a Gram-negative bacterial pathogen with a small genome of 1.64-1.67 Mb. More than 20 putative DNA restriction-modification (R-M) systems, comprising more than 4% of the total genome, have been identified in the two completely sequenced H. pylori strains, 26695 and J99, based on sequence similarities. In this study, we have investigated the biochemical activities of 14 Type II R-M systems in...

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