Details of the organisms used in this study.

For each species, the database used as the source of the data is shown, the strain that the data corresponds to, as well as the number of genes estimated for each genome, and the number of protein sequences annotated for each proteome at the specific database source. Pathogenic organisms are indicated by (p) and the disease they cause is shown. Finally, the number of fusion events detected by the SAFE software and verified in this study is given.