| P31891 | DB14523 | 4iub | PO4 | L | 707 | e4iubL3 | all-beta domain in nickel-iron hydrogenase large subunit | all-beta domain in nickel-iron hydrogenase large subunit | all-beta domain in nickel-iron hydrogenase large subunit | NiFeSe_Hases |
| P31891 | DB14523 | 4ttt | PO4 | L | 702 | e4tttL1 | FAD-linked reductases, C-terminal domain-like | Ni-Fe binding domain in nickel-iron hydrogenase large subunit | Ni-Fe binding domain in nickel-iron hydrogenase large subunit | NiFeSe_Hases |
| P31891 | DB14523 | 4ttt | PO4 | L | 702 | e4tttL3 | all-beta domain in nickel-iron hydrogenase large subunit | all-beta domain in nickel-iron hydrogenase large subunit | all-beta domain in nickel-iron hydrogenase large subunit | NiFeSe_Hases |