| C | UNK_F_TYPE | e6cd2C5 | A: beta barrels | X: FimD N-terminal domain-like | H: FimD N-terminal domain-like (From Topology) | T: FimD N-terminal domain-like | F: UNK_F_TYPE | ECOD (1.6) |
| C | Usher_1st | e6cd2C1 | A: beta barrels | X: Outer membrane meander beta-barrels | H: Usher PapC translocation pore (From Topology) | T: Usher PapC translocation pore | F: Usher_1st | ECOD (1.6) |
| C | Usher_2nd | e6cd2C3 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: Usher_2nd | ECOD (1.6) |
| C | PapC_C | e6cd2C2 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Prealbumin-like | F: PapC_C | ECOD (1.6) |
| B | PapG_C | e6cd2B2 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Common fold of diphtheria toxin/transcription factors/cytochrome f | F: PapG_C | ECOD (1.6) |
| B | PapG_N | e6cd2B1 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Common fold of diphtheria toxin/transcription factors/cytochrome f | F: PapG_N | ECOD (1.6) |
| A | PapD_C | e6cd2A1 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: PapD_C | ECOD (1.6) |
| A | PapD_N | e6cd2A2 | A: beta sandwiches | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: PapD_N | ECOD (1.6) |