9 component system: The Outer Membrane Protein Secreting Main Terminal Branch (MTB) Family
| P04739 | PilA aka FIMA aka PA4525 |
|---|---|
| P22608 | PilB aka PA4526 |
| P22609 | PilC aka PA4527 |
| P22610 | PilD aka XCPA aka PA4528 |
| P24559 | PilT aka PA0395 |
| Q51528 | FimT |
| Q51532 | PilU aka PA0396 |
| Q59652 | FimU aka PA4550 |
| Q60148 | PilE aka PA4556 |