- Classes: Peptides
 - Folds: CD4 and CD8 receptor regions
 - Superfamilies: CD4 and CD8 receptor regions
 - Families: CD4 and CD8 receptor regions
 
Protein Domains:
- T-cell surface glycoprotein CD4
- [a], [A][a]
 
 - T-cell surface glycoprotein CD8 alpha chain
- [ab]
 
 
	* [ ] : Polypeptide  - [AB] : Protein, [ab] : Small peptide
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
