| Q56220 | n/a | 2ybb | MG | 4 | 410 | e2ybb41 | 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 |
| Q56220 | n/a | 2ybb | MG | 4 | 410 | e2ybb42 | 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 |
| Q56220 | n/a | 3iam | MG | 4 | 410 | e3iam44 | 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 |
| Q56220 | n/a | 3iam | MG | 4 | 410 | e3iam46 | 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 |