12 component system: The Type IV (Conjugal DNA-Protein Transfer or VirB) Secretory Pathway (IVSP) Family
| P05351 | VirB2 aka VIB2 |
|---|---|
| P05356 | VirB6 aka VIB6 |
| P05357 | VirB8 aka VIB8 |
| P05359 | VirB10 aka VIBX |
| P0A3F8 | VirB11 aka VIB11 |
| P0A3V8 | VirB3 aka VIB3 |
| P0A3W0 | VirB4 aka VIB4 |
| P0A3W2 | VirB5 aka VIB5 |
| P0A3W4 | VirB7 aka VIB7 |
| P0A3W6 | VirB9 aka VIB9 |
| P13464 | VirD4 |
| Q44360 | TraG |