| P18188 | n/a | 4upe | CA | Q | 1552 | e4upeQ1 | 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 |
| P18188 | n/a | 4upe | CA | Q | 1552 | e4upeQ2 | 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 |
| P18188 | n/a | 4upe | CA | Q | 1552 | e4upeQ3 | 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 |
| P18188 | n/a | 4upe | CA | R | 1564 | e4upeR1 | alpha-helical domain in nickel-iron hydrogenase, large subunit | alpha-helical domain in nickel-iron hydrogenase, large subunit | alpha-helical domain in nickel-iron hydrogenase, large subunit | NiFeSe_Hases |
| P18188 | n/a | 4upe | CA | S | 1552 | e4upeS2 | 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 |
| P18188 | n/a | 4upe | CA | S | 1552 | e4upeS3 | 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 |
| P18188 | n/a | 4upe | CA | S | 1552 | e4upeS4 | 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 |