Homology classes of H. pylori core and strain-specific
genes. Each bar represents the number of strain-specific (gray) and
core genes (white) in each of the following homology classes (number of
genes/percentage of genes): unknown, H. pylori
specific strain-specific (210/56%) core (267/21%); metabolism and
biosynthesis, excluding DNA metabolism, strain-specific (11/3%) core
(410/32%) strain specific; unknown, conserved strain-specific
(27/7%) core (205/16%); cell envelope, excluding OMP and
lipopolysaccharide (LPS), strain-specific (0/0%) core (157/12%);
DNA metabolism, strain-specific (8/2%) core (54/4%); cellular
process, strain-specific (1/0.3%) core (55/4%); restriction
modification, strain-specific (38/10%) core (14/1%); OMP,
strain-specific (9/2%) core (42/3%); regulatory function,
strain-specific (0/0%) core (38/3%); LPS biosynthesis,
strain-specific (7/2%) core (29/2%); PAI, unknown function,
strain-specific (20/6%) core (0/0%); type IV secretion and
conjugation, strain-specific (12/3%) core (6/0.5%); transposase,
strain-specific (16/4%) core (0/0%); other, strain-specific
(3/0.8%) core (4/0.3%).