H. pylori belong to the group of Gram-negative bacteria with outer and inner membranes. H. pylori contains more than 60 outer membrane genes. The most studied adhesins belong to the outer MPs. In addition to adhesins, there are also efflux pump proteins and iron-regulated proteins. The inner MPs of H. pylori include Urel, an important protein for H. pylori survival, and some efflux pump proteins. https://www.hpylorimed.com/stu....dies-on-other-membra