| P69741 | n/a | 6syo | CL | MMM | 604 | e6syoTTT2 | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | NiFe_hyd_SSU_C |
| P69741 | n/a | 6syx | CL | LLL | 607 | e6syxSSS1 | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | NiFe_hyd_SSU_C |
| P69741 | n/a | 6syx | CL | MMM | 606 | e6syxTTT1 | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | NiFe_hyd_SSU_C |
| P69741 | n/a | 6szd | CL | MMM | 604 | e6szdTTT2 | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | NiFe_hyd_SSU_C |
| P69741 | n/a | 6szk | CL | LLL | 605 | e6szkSSS2 | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | NiFe_hyd_SSU_C |
| P69741 | n/a | 6szk | CL | MMM | 604 | e6szkTTT2 | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | NiFe_hyd_SSU_C |
| P69741 | n/a | 7nem | CL | M | 605 | e7nemT1 | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | NiFe_hyd_SSU_C |