| Q72AS3 | n/a | 2wpn | FE2 | B | 1499 | e2wpnB1 | 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 |
| Q72AS3 | n/a | 2wpn | FE2 | B | 1499 | e2wpnB3 | 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 |
| Q72AS3 | n/a | 2wpn | FE2 | B | 1499 | e2wpnB4 | 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 |
| Q72AS3 | n/a | 3ze6 | FE2 | B | 502 | e3ze6B1 | 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 |
| Q72AS3 | n/a | 3ze6 | FE2 | B | 502 | e3ze6B3 | 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 |
| Q72AS3 | n/a | 3ze6 | FE2 | B | 502 | e3ze6B4 | 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 |
| Q72AS3 | n/a | 3ze7 | FE2 | B | 502 | e3ze7B1 | 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 |
| Q72AS3 | n/a | 3ze7 | FE2 | B | 502 | e3ze7B3 | 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 |
| Q72AS3 | n/a | 3ze7 | FE2 | B | 502 | e3ze7B4 | 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 |
| Q72AS3 | n/a | 3ze8 | FE2 | B | 502 | e3ze8B1 | 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 |
| Q72AS3 | n/a | 3ze8 | FE2 | B | 502 | e3ze8B3 | 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 |
| Q72AS3 | n/a | 3ze8 | FE2 | B | 502 | e3ze8B4 | 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 |
| Q72AS3 | n/a | 3ze9 | FE2 | B | 502 | e3ze9B1 | 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 |
| Q72AS3 | n/a | 3ze9 | FE2 | B | 502 | e3ze9B3 | 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 |
| Q72AS3 | n/a | 3ze9 | FE2 | B | 502 | e3ze9B4 | 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 |
| Q72AS3 | n/a | 3zea | FE2 | B | 502 | e3zeaB1 | 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 |
| Q72AS3 | n/a | 3zea | FE2 | B | 502 | e3zeaB3 | 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 |
| Q72AS3 | n/a | 3zea | FE2 | B | 502 | e3zeaB4 | 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 |
| Q72AS3 | n/a | 5jsh | FE2 | B | 603 | e5jshB1 | 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 |
| Q72AS3 | n/a | 5jsh | FE2 | B | 603 | e5jshB2 | 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 |
| Q72AS3 | n/a | 5jsh | FE2 | B | 603 | e5jshB3 | 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 |
| Q72AS3 | n/a | 5jsk | FE2 | B | 604 | e5jskB1 | 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 |
| Q72AS3 | n/a | 5jsk | FE2 | B | 604 | e5jskB2 | 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 |
| Q72AS3 | n/a | 5jsk | FE2 | B | 604 | e5jskB3 | 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 |
| Q72AS3 | n/a | 5jsu | FE2 | B | 604 | e5jsuB1 | 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 |
| Q72AS3 | n/a | 5jsu | FE2 | B | 604 | e5jsuB2 | 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 |
| Q72AS3 | n/a | 5jsu | FE2 | B | 604 | e5jsuB4 | 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 |
| Q72AS3 | n/a | 5jsy | FE2 | B | 603 | e5jsyB1 | 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 |
| Q72AS3 | n/a | 5jsy | FE2 | B | 603 | e5jsyB3 | 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 |
| Q72AS3 | n/a | 5jsy | FE2 | B | 603 | e5jsyB4 | 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 |
| Q72AS3 | n/a | 5jt1 | FE2 | B | 603 | e5jt1B1 | 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 |
| Q72AS3 | n/a | 5jt1 | FE2 | B | 603 | e5jt1B2 | 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 |
| Q72AS3 | n/a | 5jt1 | FE2 | B | 603 | e5jt1B4 | 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 |
| Q72AS3 | n/a | 6rtp | FE2 | B | 503 | e6rtpB1 | 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 |
| Q72AS3 | n/a | 6rtp | FE2 | B | 503 | e6rtpB2 | 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 |
| Q72AS3 | n/a | 6rtp | FE2 | B | 503 | e6rtpB3 | 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 |
| Q72AS3 | n/a | 6ru9 | FE2 | B | 503 | e6ru9B1 | 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 |
| Q72AS3 | n/a | 6ru9 | FE2 | B | 503 | e6ru9B2 | 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 |
| Q72AS3 | n/a | 6ru9 | FE2 | B | 503 | e6ru9B4 | 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 |
| Q72AS3 | n/a | 6ruc | FE2 | B | 503 | e6rucB1 | 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 |
| Q72AS3 | n/a | 6ruc | FE2 | B | 503 | e6rucB2 | 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 |
| Q72AS3 | n/a | 6ruc | FE2 | B | 503 | e6rucB3 | 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 |
| Q72AS3 | n/a | 6z7r | FE2 | B | 503 | e6z7rB1 | 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 |
| Q72AS3 | n/a | 6z7r | FE2 | B | 503 | e6z7rB3 | 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 |
| Q72AS3 | n/a | 6z7r | FE2 | B | 503 | e6z7rB4 | 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 |
| Q72AS3 | n/a | 6z7r | FE2 | D | 503 | e6z7rD2 | 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 |
| Q72AS3 | n/a | 6z7r | FE2 | D | 503 | e6z7rD3 | 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 |
| Q72AS3 | n/a | 6z7r | FE2 | D | 503 | e6z7rD4 | 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 |
| Q72AS3 | n/a | 6z8j | FE2 | B | 503 | e6z8jB2 | 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 |
| Q72AS3 | n/a | 6z8j | FE2 | B | 503 | e6z8jB3 | 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 |
| Q72AS3 | n/a | 6z8j | FE2 | B | 503 | e6z8jB4 | 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 |
| Q72AS3 | n/a | 6z8j | FE2 | D | 503 | e6z8jD1 | 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 |
| Q72AS3 | n/a | 6z8j | FE2 | D | 503 | e6z8jD3 | 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 |
| Q72AS3 | n/a | 6z8j | FE2 | D | 503 | e6z8jD4 | 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 |
| Q72AS3 | n/a | 6z8m | FE2 | B | 503 | e6z8mB1 | 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 |
| Q72AS3 | n/a | 6z8m | FE2 | B | 503 | e6z8mB2 | 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 |
| Q72AS3 | n/a | 6z8m | FE2 | B | 503 | e6z8mB3 | 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 |
| Q72AS3 | n/a | 6z8o | FE2 | B | 503 | e6z8oB1 | 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 |
| Q72AS3 | n/a | 6z8o | FE2 | B | 503 | e6z8oB3 | 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 |
| Q72AS3 | n/a | 6z8o | FE2 | B | 503 | e6z8oB4 | 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 |
| Q72AS3 | n/a | 6z8o | FE2 | D | 503 | e6z8oD1 | 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 |
| Q72AS3 | n/a | 6z8o | FE2 | D | 503 | e6z8oD3 | 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 |
| Q72AS3 | n/a | 6z8o | FE2 | D | 503 | e6z8oD4 | 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 |
| Q72AS3 | n/a | 6z9g | FE2 | B | 502 | e6z9gB1 | 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 |
| Q72AS3 | n/a | 6z9g | FE2 | B | 502 | e6z9gB2 | 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 |
| Q72AS3 | n/a | 6z9g | FE2 | B | 502 | e6z9gB4 | 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 |
| Q72AS3 | n/a | 6z9g | FE2 | D | 502 | e6z9gD1 | 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 |
| Q72AS3 | n/a | 6z9g | FE2 | D | 502 | e6z9gD2 | 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 |
| Q72AS3 | n/a | 6z9g | FE2 | D | 502 | e6z9gD3 | 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 |
| Q72AS3 | n/a | 6z9g | FE2 | F | 502 | e6z9gF1 | 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 |
| Q72AS3 | n/a | 6z9g | FE2 | F | 502 | e6z9gF2 | 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 |
| Q72AS3 | n/a | 6z9g | FE2 | F | 502 | e6z9gF3 | 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 |
| Q72AS3 | n/a | 6z9g | FE2 | H | 502 | e6z9gH1 | 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 |
| Q72AS3 | n/a | 6z9g | FE2 | H | 502 | e6z9gH2 | 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 |
| Q72AS3 | n/a | 6z9g | FE2 | H | 502 | e6z9gH4 | 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 |
| Q72AS3 | n/a | 6z9o | FE2 | B | 503 | e6z9oB1 | 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 |
| Q72AS3 | n/a | 6z9o | FE2 | B | 503 | e6z9oB2 | 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 |
| Q72AS3 | n/a | 6z9o | FE2 | B | 503 | e6z9oB3 | 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 |
| Q72AS3 | n/a | 6za1 | FE2 | B | 503 | e6za1B1 | 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 |
| Q72AS3 | n/a | 6za1 | FE2 | B | 503 | e6za1B2 | 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 |
| Q72AS3 | n/a | 6za1 | FE2 | B | 503 | e6za1B3 | 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 |