| D | Globin | e3r4kD1 | A: beta barrels | X: Lipocalins/Streptavidin | H: Zn-dependent exopeptidases | T: Zn-dependent exopeptidases | F: Globin | ECOD (v294.2) |
| C | Globin | e3r4kC1 | A: beta barrels | X: Lipocalins/Streptavidin | H: Zn-dependent exopeptidases | T: Zn-dependent exopeptidases | F: Globin | ECOD (v294.2) |
| B | Globin | e3r4kB1 | A: beta barrels | X: Lipocalins/Streptavidin | H: Zn-dependent exopeptidases | T: Zn-dependent exopeptidases | F: Globin | ECOD (v294.2) |
| A | I-set | e3r4kA1 | A: beta barrels | X: Acyl-CoA binding protein-like | H: Acyl-CoA binding protein-like | T: Acyl-CoA binding protein-like | F: I-set | ECOD (v294.2) |