In molecular biology, a large group of related proteins or other molecules. Some examples are:
- APOBEC
- bHLH-PAS
- Crystallin, beta gamma
- G protein-coupled receptor
- Immunoglobulin superfamily
- kinesin superfamily
- Ras_(protein)#The_Ras_superfamily
- Transforming growth factor beta superfamily
- transmembrane 4 superfamily, also known as the tetraspanin family