- Classes: Peptides
 - Folds: Peptide hormones
 - Superfamilies: Peptide hormones
 - Families: Peptide hormones
 
Protein Domains:
- Calcitonin
- [A]
 - [A]
 - [A]
 
 - Deaminooxytocin
- [a2], [a]
 
 - Exendin-4
- [AB], [A]
 
 - Gastric inhibitory polypeptide, GIP
- [A]
 
 - Glucagon
- [a]
 - [a3]
 
 - Glucagon-like peptide-1-(7-36)-amide
- [A]
 
 - Hypocretin-2/orexin- b'
- [a]
 
 - Motilin
- [a]
 
 - Neurokinin B
- [a]
 
 - Neuromedin B
- [a]
 
 - Neuropeptide F
- [A]
 
 - Neuropeptide Y
- [A]
 - [A]
 
 - Neuropeptide Y analogues
- [a], [A]
 
 - Orexin
- [A]
 
 - Pancreatic polypeptide
- ---, [A]
 - [A2]
 
 - Pardaxin P-4
- [A]
 
 - Peptide YY, PYY
- [A]
 - [A]
 
 - Pituitary adenylate cyclase-activating polypeptide, PACAP
- [AB]
 
 - Transportan (galanin-like peptide)
- [a]
 
 
	* [ ] : Polypeptide  - [AB] : Protein, [ab] : Small peptide
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
