| aa | amino acids |
| RTX | repeats-in-toxins |
| T1SSs | type 1 secretion systems |
| TSDs | target site duplications |
| BIg-like | bacterial immunoglobulin-like |
| aa | amino acids |
| RTX | repeats-in-toxins |
| T1SSs | type 1 secretion systems |
| TSDs | target site duplications |
| BIg-like | bacterial immunoglobulin-like |