| B | Formyl_trans_N | e4lxtB1 | A: beta barrels | X: Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | H: Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | T: Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | F: Formyl_trans_N | ECOD (v294.2) |
| B | | e4lxtB2 | A: beta barrels | X: Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | H: Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | T: Fe-S cluster-binding domain in nickel-iron hydrogenase small subunit | F: | ECOD (v294.2) |
| A | preSET_CXC | e4lxtA1 | A: beta barrels | X: FAD-linked reductases, C-terminal domain-like | H: FAD-linked reductases-C | T: FAD-linked reductases-C | F: preSET_CXC | ECOD (v294.2) |