- Classes: Peptides
 - Folds: Transmembrane helical fragments
 - Superfamilies: Transmembrane helical fragments
 - Families: Transmembrane helical fragments
 
Protein Domains:
- Active domain of protein icp47
- [A]
 
 - Amphipathic domain of YopD
- [a]
 
 - Bacteriorhodopsin fragments
- [A]
 
 - Band 3
- [a], [A]
 
 - Cytoplasmic domain of p23
- [a4], [a]
 
 - Dimeric transmembrane domain of glycophorin A
- [A2]
 
 - Glycine receptor alpha-1 chain
- [A], [a]
 
 - Matrix protein M2 transmembrane peptide
- [A4]
 - [a4]
 
 - Membrane anchor domain of the nonstructural protein 5a (NS5a)
- [A]
 
 - Membrane binding peptide of semliki forest virus mRNA capping enzyme nsp1
- [a]
 
 - Membrane domain of the subunit b of ATP synthase
- [A]
 
 - Membrane spanning segment 2 (M2) of the acetylcholine receptor
- [a]
 - ---
 
 - N-terminal membrane anchor of the glucose-specific IIa component
- [a]
 
 - Neu/erbb-2 membrane spanning segment
- [A]
 
 - Potassium channel fragment L45
- [a]
 
 - Pulmonary surfactant-associated polypeptide C (SP-C)
- [A]
 
 - Sarcolipin
- [A]
 
 - Second repeat (is2mic) from voltage-gated sodium channel
- [a]
 
 - Surfactant Protein B (SP-B) miniprotein constructs
- [a], [A]
 
 - Transmembrane segment 2 of NMDA receptor NR1
- [a]
 
 - Vpu protein
- [A]
 
 - alpha-subunit of nicotinic acetylcholine receptor
- [a]
 
 - beta-Adrenoreceptor
- [a]
 
 - fragment of hepatitis C envelope glycoprotein E (residues 350-370)
- [a]
 
 
	* [ ] : Polypeptide  - [AB] : Protein, [ab] : Small peptide
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
