- Classes: All beta proteins
- Folds: Small protein B (SmpB)
- Superfamilies: Small protein B (SmpB)
- Families: Small protein B (SmpB)
Protein Domains:
- Small protein B (SmpB)
- [A], [A](a)
- [A], [AB](abcdefghi), [A](a), [A2](ab)
* [ ] : Polypeptide - [AB] : Protein, [ab] : Small peptide
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
