- Classes: Membrane and cell surface proteins and peptides
- Folds: a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
- Superfamilies: a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Families:
- 43
- 11
* Number of SCOP families of each Family