FIG 1.

LOS locus classes related to classes X, XI, and XII. Arrows represent ORFs. Genes in white are common to all LOS classes. Genes in green are present in classes I and/or III. Genes in blue are present in classes IV/V and VI. Gray genes are common among classes X and XI. Orange genes are particular to class XII. Striped genes are fragmented. Lines connect closely related orthologues. Strains are identified if more than one origin was observed in the LOS locus class (see the text). Gene size is not drawn to scale.