| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 5XNC-FE-1 | FE | Fe³⁺ | C4 | CYS. | CYS. | ✔ | 4 | 4 | 2 | ✔ |
| 5XNF-FE-1 | FE | Fe³⁺ | C4 | CYS. | CYS. | ✔ | 4 | 4 | 2 | ✘ |
| 5XNH-FE-1 | FE | Fe³⁺ | C4 | CYS. | CYS. | ✔ | 4 | 4 | 2 | ✘ |
| 6J27-FE-1 | FE | Fe³⁺ | C4 | CYS. | CYS. | ✔ | 4 | 4 | 2 | ✔ |
| 6J26-FE-1 | FE | Fe³⁺ | C4 | CYS. | CYS. | ✔ | 4 | 4 | 2 | ✘ |
| 6J28-FE-1 | FE | Fe³⁺ | C4 | CYS. | CYS. | ✔ | 4 | 4 | 2 | ✘ |
| 4P6V-FE-1 | FE | Fe³⁺ | C4 | CYS. | CYS. | ✘ | 4 | 4 | 2 | ✔ |
| 7ZC6-FE-1 | FE | Fe³⁺ | C4 | CYS. | CYS. | ✘ | 4 | 4 | 2 | ✔ |