| A0QU33 | n/a | 8e9g | MQ9 | B | 202 | e8e9gD1 | 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 | Complex1_49kDa |
| A0QU33 | n/a | 8e9g | MQ9 | B | 202 | e8e9gD2 | 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 | Complex1_49kDa |
| A0QU33 | n/a | 8e9g | MQ9 | B | 202 | e8e9gD3 | 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 | Complex1_49kDa |
| A0QU33 | n/a | 8e9h | MQ9 | D | 501 | e8e9hD1 | 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 | Complex1_49kDa |
| A0QU33 | n/a | 8e9h | MQ9 | D | 501 | e8e9hD2 | 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 | Complex1_49kDa |
| A0QU33 | n/a | 8e9h | MQ9 | D | 501 | e8e9hD3 | 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 | Complex1_49kDa |
| A0QU33 | n/a | 8e9i | MQ9 | H | 501 | e8e9iD2 | 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 | Complex1_49kDa |