| P17694 | n/a | 7dh0 | 3PE | B | 501 | e7dh0B1 | 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 |
| P17694 | n/a | 7dkf | 3PE | B2 | 501 | e7dkfB21 | 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 |
| P17694 | n/a | 7r4f | 3PE | I | 201 | e7r4fD1 | 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 |