- Classes: Alpha and beta proteins (a+b)
- Folds: Pili subunits
- Superfamilies: Pili subunits
- Families: Pilin
Protein Domains:
- Pilin Gc
- [A], [A2]
- Pilin P1
- [A2], [A]
- Type IV Pilin Pak
- [A]
- Type IVb pilin PilS
- [A]
- automated matches
- [A]
- [A]
- [A2], [A2][a]
* [ ] : Polypeptide - [AB] : Protein, [ab] : Small peptide
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA