- Classes: Multi-domain proteins (alpha and beta)
 - Folds: Influenza virus PB2 N-terminal region
 - Superfamilies: Influenza virus PB2 N-terminal region
 - Families: Influenza virus PB2 N-terminal region
 
Protein Domains:
- Polymerase basic protein 2, PB2
- [ABC](ab)
 - [ABC]
 
 
	* [ ] : Polypeptide  - [AB] : Protein, [ab] : Small peptide
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
