title: Ultrastructural localization of urease of Helicobacter pylori.
abstract: Helicobacter pylori urease was characterized by means of an enzyme histochemical electron microscopic technique. Ultrastructural analysis revealed no urease activity in one strain; in seven H. pylori strains (43.75%), urease activity was associated with the cell membrane. Eight strains (50.0%) showed reaction product located within the cytoplasm. Urease activity showed no correlation with localization of activity. Our results demonstrate that H. pylori urease is not uniform in all H. pylori strains, and differences in activity and localization of urease activity may account for different virulence activities.
authors.affiliation: Department of Internal Medicine I, University of Ulm, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Bode
authors.forename: P
authors.initials: P
authors.lastname: Malfertheiner
authors.forename: G
authors.initials: G
authors.lastname: Lehnhardt
authors.forename: M
authors.initials: M
authors.lastname: Nilius
authors.forename: H
authors.initials: H
authors.lastname: Ditschuneit
mesh_terms: D016480:Helicobacter pylori / Q000201:enzymology* / Q000302:isolation & purification / Q000648:ultrastructure; D006801:Humans; D014510:Urease / Q000032:analysis* / Q000378:metabolism
chemical_list: D014510:Urease