| D | Arf | e4r81D1 | A: a/b three-layered sandwiches | X: thumb domain in bacteriophage RB69-like DNA polymerase I | H: thumb domain in bacteriophage RB69-like DNA polymerase I | T: thumb domain in bacteriophage RB69-like DNA polymerase I | F: Arf | ECOD (v294.1) |
| C | Arf | e4r81C1 | A: a/b three-layered sandwiches | X: thumb domain in bacteriophage RB69-like DNA polymerase I | H: thumb domain in bacteriophage RB69-like DNA polymerase I | T: thumb domain in bacteriophage RB69-like DNA polymerase I | F: Arf | ECOD (v294.1) |
| B | Arf | e4r81B1 | A: a/b three-layered sandwiches | X: thumb domain in bacteriophage RB69-like DNA polymerase I | H: thumb domain in bacteriophage RB69-like DNA polymerase I | T: thumb domain in bacteriophage RB69-like DNA polymerase I | F: Arf | ECOD (v294.1) |
| A | Arf | e4r81A1 | A: a/b three-layered sandwiches | X: thumb domain in bacteriophage RB69-like DNA polymerase I | H: thumb domain in bacteriophage RB69-like DNA polymerase I | T: thumb domain in bacteriophage RB69-like DNA polymerase I | F: Arf | ECOD (v294.1) |