Bayesian phylogeny and split decomposition of ggt orthologs in ϵ-proteobacteria. A. Bayesian phylogeny of ggt orthologs in different ϵ-proteobacterial species, rooted with the ggt sequence of gamma-proteobacterium Escherichia coli (E. coli). From down to up: Helicobacter bilis and H. trogontum (represented as Flexispira-like Helicobacter spp.); Campylobacter coli; C. jejuni; H. canis and H. pylori, H. acinonychis, H. bizzozeronii and H. felis (represented as Gastric Helicobacter species). Numbers on the branch indicate distance values and the numbers on the nodes indicate posterior probability. Posterior probability values indicated in blue font are >70% and those indicated in red font are <70%. B. Split decomposition analysis of ggt orthologs in C. jejuni and C. coli and Helicobacter species. Absence of a netlike structure between C. jejuni and C. coli indicates absence of HGT between the two species.