| A | FRB_dom | e3aibA1 | A: a/b three-layered sandwiches | X: P-loop domains-like | H: ARM repeat | T: ARM repeat | F: FRB_dom | ECOD (v294.1) |
| B | FRB_dom | e3aibB1 | A: a/b three-layered sandwiches | X: P-loop domains-like | H: ARM repeat | T: ARM repeat | F: FRB_dom | ECOD (v294.1) |
| C | ANAPC4 | e3aibC1 | A: a/b three-layered sandwiches | X: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 | H: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 | T: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 | F: ANAPC4 | ECOD (v294.1) |
| D | ANAPC4 | e3aibD1 | A: a/b three-layered sandwiches | X: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 | H: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 | T: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 | F: ANAPC4 | ECOD (v294.1) |
| E [auth G] | FRB_dom | e3aibG1 | A: a/b three-layered sandwiches | X: P-loop domains-like | H: ARM repeat | T: ARM repeat | F: FRB_dom | ECOD (v294.1) |
| F [auth E] | ANAPC4 | e3aibE1 | A: a/b three-layered sandwiches | X: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 | H: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 | T: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 | F: ANAPC4 | ECOD (v294.1) |
| G [auth F] | ANAPC4 | e3aibF1 | A: a/b three-layered sandwiches | X: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 | H: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 | T: Sulfite reductase hemoprotein (SiRHP), domains 2 and 4 | F: ANAPC4 | ECOD (v294.1) |
| H | OTCace_N | e3aibH1 | A: a/b three-layered sandwiches | X: Transmembrane heme-binding four-helical bundle | H: P-loop domains-related | T: P-loop containing nucleoside triphosphate hydrolases | F: OTCace_N | ECOD (v294.1) |