| D | FCH | e5h5vD1 | A: a/b three-layered sandwiches | X: Ntn/PP2C | H: Ntn | T: Penicillin acylase, catalytic domain | F: FCH | ECOD (v294.1) |
| F | FCH | e5h5vF1 | A: a/b three-layered sandwiches | X: Ntn/PP2C | H: Ntn | T: Penicillin acylase, catalytic domain | F: FCH | ECOD (v294.1) |
| E | FliD_C | e5h5vE1 | A: a/b three-layered sandwiches | X: HAD domain-like | H: Class I glutamine amidotransferase-like | T: CheY-like | F: FliD_C | ECOD (v294.1) |
| E | Amdase | e5h5vE2 | A: a/b three-layered sandwiches | X: HAD domain-like | H: Class I glutamine amidotransferase-like | T: CheY-like | F: Amdase | ECOD (v294.1) |
| C | Flagellin_IN | e5h5vC1 | A: a/b three-layered sandwiches | X: Ntn/PP2C | H: gp11/flagellar cap protein FliD insertion domain | T: gp11/flagellar cap protein FliD insertion domain | F: Flagellin_IN | ECOD (v294.1) |
| C | FliD_C | e5h5vC3 | A: a/b three-layered sandwiches | X: Ntn/PP2C | H: Ntn | T: Penicillin acylase, catalytic domain | F: FliD_C | ECOD (v294.1) |
| B | FCH | e5h5vB1 | A: a/b three-layered sandwiches | X: Ntn/PP2C | H: Ntn | T: Penicillin acylase, catalytic domain | F: FCH | ECOD (v294.1) |
| A | FCH | e5h5vA1 | A: a/b three-layered sandwiches | X: Ntn/PP2C | H: Ntn | T: Penicillin acylase, catalytic domain | F: FCH | ECOD (v294.1) |