Gene content and order of the clade B-specific GT-rich gene cluster. Gene content and order of the clade B-specific GT-rich gene cluster. The gene cluster is shown in all 10 clade B strains. Contigs were mapped to AMBR2; contig boundaries are indicated by broken vertical lines. Functional annotation was performed on the orthogroup level; multiple orthogroups can have the same function assigned to them. For example, the SecA2/SecY2 system consists of five orthogroups, SecA2, SecY2, Asp1, Asp2, and Asp3. Sander Wuyts et al. mSystems 2017; doi:10.1128/mSystems.00061-17