| E | Plug | e5lkhE1 | A: alpha bundles | 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: Plug | ECOD (develop294) |
| D | Plug | e5lkhD1 | A: alpha bundles | 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: Plug | ECOD (develop294) |
| C | Plug | e5lkhC1 | A: alpha bundles | 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: Plug | ECOD (develop294) |
| B | Plug | e5lkhB1 | A: alpha bundles | 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: Plug | ECOD (develop294) |
| A | TcdA1_RBD_2 | e5lkhA2 | A: alpha bundles | X: Long alpha-hairpin | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: TcdA1_RBD_2 | ECOD (develop294) |