[A4](A4B4)
- Classes: Alpha and beta proteins (a+b)
- Folds: DNA breaking-rejoining enzymes
- Superfamilies: DNA breaking-rejoining enzymes
- Families: Lambda integrase-like, catalytic core
Protein Domains:
- Cre recombinase
- Flp recombinase
* [ ] : Polypeptide - [AB] : Protein, [ab] : Small peptide
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA