9Tombola F, Morbiato L, Del Giudice G, et al. The Helicobacterpylori VacA toxin is a urea permease that promotes urea diffusionacross epithelia[J]. J Clin Invest,2001,108(6) :929-934.
10Backert S,Moese S,Selbach M,et al. Phosphorylation of tyrosine972 of the Helicobacter pylori CagA protein is essential for induc-tion of a scattering phenotype in gastric epithelial cells[J]. MolMicrobiol,2001,42(5) :631-644.