[HpyNI--a novel restriction endonuclease isolated from the pathogenic microorganism Helicobacter pylori]

HpyNI is the first restriction endonuclease which has been isolated from pathogenic Helicobacter pylori. HpyNI, a new isoschizomer of ScrFI, recognizes and cleaves the palindromic sequence 5'CCNGG-3'.