| A | RNA_pol_Rpc34 | e7firA1 | A: a/b three-layered sandwiches | X: RNase A-like | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: RNA_pol_Rpc34 | ECOD (v294.1) |
| B | RNA_pol_Rpc34 | e7firB1 | A: a/b three-layered sandwiches | X: RNase A-like | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: RNA_pol_Rpc34 | ECOD (v294.1) |
| C | RNA_pol_Rpc34 | e7firC1 | A: a/b three-layered sandwiches | X: RNase A-like | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: RNA_pol_Rpc34 | ECOD (v294.1) |
| D | RNA_pol_Rpc34 | e7firD1 | A: a/b three-layered sandwiches | X: RNase A-like | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: RNA_pol_Rpc34 | ECOD (v294.1) |