Helicobacter pylori is a gram-negativebacterium that lives inside the mucus lining of the stomach. It belongs among the proteobacteria. Many gastric ulcers are caused by H. pylori infection, although most humans are infected and not all infections lead to symptoms. Two strains of H. pylori have been sequenced.
... and Some Yakuts. The Gilyaks in the north support themselves by fishing and hunting.
The Ainus inhabit the south part of the island. From the 32,000 Russians ...