- Classes: Peptides
 - Folds: Transmembrane helical fragments
 - Superfamilies: Transmembrane helical fragments
 - Families: Transmembrane helical fragments
 
Protein Domains:
- ASLV fusion peptide
- [a]
 
 - BH3 domain of proapoptotic protein Bim
- [AB]
 
 - Band 3
- [A], [a]
 
 - Cystic fibrosis transmembrane conductance regulator
- [a]
 
 - F1F0 ATP synthase subunit C fragments
- [A]
 
 - Matrix protein M2 transmembrane peptide
- [a]
 
 - Membrane spanning segment 2 (M2) of the acetylcholine receptor
- [a5]
 
 - Pheromone alpha factor receptor
- [a]
 
 - Rhodopsin fragments
- [A], [a]
 
 
	* [ ] : Polypeptide  - [AB] : Protein, [ab] : Small peptide
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
