| Q9UUU1 | n/a | 6h8k | SF4 | K | 500 | e6h8kC1 | 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 |
| Q9UUU1 | n/a | 6rfs | SF4 | K | 301 | e6rfsC1 | 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 |
| Q9UUU1 | n/a | 6rfs | SF4 | K | 301 | e6rfsC3 | 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 |