| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 6C66-FE-1 | FE | Fe³⁺ | A1D2 | ASP.DA. | ASP.DA. | ✘ | 3 | 3 | 2 | ✔ |
| 4QQW-FE-2 | FE | Fe³⁺ | A1D2 | ASP.DA. | ASP.DA. | ✘ | 3 | 3 | 2 | ✔ |
| 4QQW-FE-4 | FE | Fe³⁺ | A1D2 | ASP.DA. | ASP.DA. | ✘ | 3 | 3 | 2 | ✔ |
| 4QQX-FE-2 | FE | Fe³⁺ | A1D2 | ASP.DA. | ASP.DA. | ✘ | 3 | 3 | 2 | ✔ |
| 4QQX-FE-4 | FE | Fe³⁺ | A1D2 | ASP.DA. | ASP.DA. | ✘ | 3 | 3 | 2 | ✔ |
| 4QQY-FE-2 | FE | Fe³⁺ | A1D2 | ASP.DA. | ASP.DA. | ✘ | 3 | 3 | 2 | ✔ |
| 4QQY-FE-4 | FE | Fe³⁺ | A1D2 | ASP.DA. | ASP.DA. | ✘ | 3 | 3 | 2 | ✔ |
| 4QQZ-FE-2 | FE | Fe³⁺ | A1D2 | ASP.DA. | ASP.DA. | ✘ | 3 | 3 | 2 | ✔ |
| 4QQZ-FE-4 | FE | Fe³⁺ | A1D2 | ASP.DA. | ASP.DA. | ✘ | 3 | 3 | 2 | ✔ |