Number of Protein Chains:2
- Classes: All alpha proteins
 - Folds: Tetraspanin
 - Superfamilies: Tetraspanin
 - Families: Tetraspanin
 
Protein Domains:
- CD81 extracellular domain
 - automated matches
 
	* [ ] : Polypeptide  - [AB] : Protein, [ab] : Small peptide
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
	
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
