| A | Cys_Met_Meta_PP | e4nc9A2 | A: a/b three-layered sandwiches | X: Cytidine deaminase-like | H: Cytidine deaminase-like | T: Cytidine deaminase-like | F: Cys_Met_Meta_PP | ECOD (v294.1) |
| A | DUF34_NIF3 | e4nc9A3 | A: a/b three-layered sandwiches | X: Rubredoxin-like | H: Ferritin/Heme oxygenase | T: Heme oxygenase/Ribonucleotide reductase | F: DUF34_NIF3 | ECOD (v294.1) |
| B | Cys_Met_Meta_PP | e4nc9B2 | A: a/b three-layered sandwiches | X: Cytidine deaminase-like | H: Cytidine deaminase-like | T: Cytidine deaminase-like | F: Cys_Met_Meta_PP | ECOD (v294.1) |
| B | Phosphodiest, Metalloenzyme | e4nc9B3 | A: a/b three-layered sandwiches | X: Rubredoxin-like | H: Rubredoxin-related | T: Rubredoxin-related | F: Phosphodiest, Metalloenzyme | ECOD (v294.1) |
| C | Cys_Met_Meta_PP | e4nc9C2 | A: a/b three-layered sandwiches | X: Cytidine deaminase-like | H: Cytidine deaminase-like | T: Cytidine deaminase-like | F: Cys_Met_Meta_PP | ECOD (v294.1) |
| C | Phosphodiest, Metalloenzyme | e4nc9C3 | A: a/b three-layered sandwiches | X: Rubredoxin-like | H: Rubredoxin-related | T: Rubredoxin-related | F: Phosphodiest, Metalloenzyme | ECOD (v294.1) |
| D | Cys_Met_Meta_PP | e4nc9D2 | A: a/b three-layered sandwiches | X: Cytidine deaminase-like | H: Cytidine deaminase-like | T: Cytidine deaminase-like | F: Cys_Met_Meta_PP | ECOD (v294.1) |
| D | DUF34_NIF3 | e4nc9D3 | A: a/b three-layered sandwiches | X: Rubredoxin-like | H: Ferritin/Heme oxygenase | T: Heme oxygenase/Ribonucleotide reductase | F: DUF34_NIF3 | ECOD (v294.1) |