... distinguished. Helices B,E, F and H, arranged in an up -and- down topology,form the structural core, whereas the short helices C,D and G on one side, and A, I and J on the other,represent types ... moleculeinvolving a-helix A, the nearby loop, the first and lastturns of helices E and F, and the C-terminus helices I and J. In addition, there is a lysine-rich N- and C-ter-minus, in accordance with the ... MINIREVIEWStructural and functional aspects of unique type IVsecretory components in the Helicobacter pyloricag-pathogenicity islandLaura Cendron1 and Giuseppe Zanotti21 Department...