- Classes: Alpha and beta proteins (a+b)
 - Folds: Photosystem I subunit PsaD
 - Superfamilies: Photosystem I subunit PsaD
 - Families: Photosystem I subunit PsaD
 
Protein Domains:
- Photosystem I subunit PsaD
- [A3B3C3D3E3F3G3H3I3J3K3L3]
 
 - automated matches
- [A3B2CDEFGHIJKLMNOPQRSTUVWXYZabcde][a]
 - [A2BCDEFGHIJKLMNOPQRSTUVW]
 - [ABCDEFGHIJKLMNOPQRS]
 - [A2BCDEFGHIJKLMNOPQRST], [A2B2C2DEFGHIJKLMNOPQRSTUVWXYZ], [A2BCDEFGHIJKLMNOPQ]
 - [A2B2C2D2E2F2G2H2I2J2K2L2]
 - [ABCDEFGHIJKLMNOP], [ABCDEFGHIJKLMNOPQR]
 - [A3B3C3D2E2F2G2H2I2J2KLMNOPQRST]
 - [ABCDEFGHI]
 
 
	* [ ] : Polypeptide  - [AB] : Protein, [ab] : Small peptide
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
