- Classes: Alpha and beta proteins (a+b)
 - Folds: Aromatic aminoacid monoxygenases, catalytic and oligomerization domains
 - Superfamilies: Aromatic aminoacid monoxygenases, catalytic and oligomerization domains
 - Families: Aromatic aminoacid monoxygenases, catalytic and oligomerization domains
 
Protein Domains:
- Phenylalanine hydroxylase, PAH
- [A]
 - [A], [A2], [A4]
 - [A2]
 
 - Tryptophan hydroxylase
- [A]
 
 - Tyrosine hydroxylase
- [A4]
 
 - automated matches
- [A]
 - [A]
 - [A4], [A]
 
 
	* [ ] : Polypeptide  - [AB] : Protein, [ab] : Small peptide
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
