| Id | Element | Ion | Binding family | Amino acids or nucleotide residues names | All bound residues | Is homomer | Number of bound amino acids or nucleotide residues | Number of all bound residues | Number of coordinating chains | Representative |
|---|---|---|---|---|---|---|---|---|---|---|
| 7O90-FE-1 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✔ |
| 7O90-FE-2 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✘ |