| D | Secretin_N | e7mrkD1 | A: a/b three-layered sandwiches | X: RNase A-like | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: Secretin_N | ECOD (v294.1) |
| B | Secretin_N | e7mrkB1 | A: a/b three-layered sandwiches | X: RNase A-like | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: Secretin_N | ECOD (v294.1) |
| C | Secretin_N | e7mrkC1 | A: a/b three-layered sandwiches | X: RNase A-like | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: Secretin_N | ECOD (v294.1) |
| A | Secretin_N | e7mrkA1 | A: a/b three-layered sandwiches | X: RNase A-like | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: Secretin_N | ECOD (v294.1) |