| D | ClpB_D2-small | e2fflD2 | A: alpha bundles | X: YrdC/RibB | H: SH3 | T: SH3 | F: ClpB_D2-small | ECOD (develop294) |
| D | Rieske | e2fflD5 | A: alpha bundles | X: Lipocalins/Streptavidin | H: RIFT-related | T: acid protease | F: Rieske | ECOD (develop294) |
| C | ClpB_D2-small | e2fflC2 | A: alpha bundles | X: YrdC/RibB | H: SH3 | T: SH3 | F: ClpB_D2-small | ECOD (develop294) |
| C | Rieske | e2fflC5 | A: alpha bundles | X: Lipocalins/Streptavidin | H: RIFT-related | T: acid protease | F: Rieske | ECOD (develop294) |
| B | Cpn10 | e2fflB1 | A: alpha bundles | X: Lipocalins/Streptavidin | H: Fibronectin type I module-like | T: Fibronectin type I module | F: Cpn10 | ECOD (develop294) |
| B | Glyco_hydro_32C | e2fflB4 | A: alpha bundles | X: P-loop domains-like | H: Hemagglutinin HA2 chain | T: Hemagglutinin HA2 chain | F: Glyco_hydro_32C | ECOD (develop294) |
| A | Ribonuclease_3 | e2fflA1 | A: alpha bundles | X: RNase III catalytic domain-like | H: RNase III catalytic domain-like | T: RNase III catalytic domain-like | F: Ribonuclease_3 | ECOD (develop294) |