| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 5E79-FE-1 | FE | Fe²⁺ | H4 | HIS. | HIS. | ✘ | 4 | 4 | 2 | ✔ |
| 5E79-FE-3 | FE | Fe²⁺ | H4 | HIS. | HIS. | ✘ | 4 | 4 | 2 | ✔ |
| 1W5C-FE-1 | FE | Fe²⁺ | H4 | HIS. | HIS. | ✘ | 4 | 4 | 2 | ✔ |
| 7KE3-FE-3 | FE | Fe³⁺ | H4 | HIS. | HIS. | ✔ | 4 | 4 | 4 | ✘ |
| 7KE3-FE-6 | FE | Fe³⁺ | H4 | HIS. | HIS. | ✔ | 4 | 4 | 4 | ✘ |
| 7KE3-FE-9 | FE | Fe³⁺ | H4 | HIS. | HIS. | ✔ | 4 | 4 | 4 | ✘ |
| 7KE3-FE-12 | FE | Fe³⁺ | H4 | HIS. | HIS. | ✔ | 4 | 4 | 4 | ✘ |
| 8EN7-FE-1 | FE | Fe³⁺ | H4 | HIS. | HIS. | ✔ | 4 | 4 | 4 | ✘ |
| 8EN7-FE-2 | FE | Fe³⁺ | H4 | HIS. | HIS. | ✔ | 4 | 4 | 4 | ✘ |
| 8EN7-FE-3 | FE | Fe³⁺ | H4 | HIS. | HIS. | ✔ | 4 | 4 | 4 | ✘ |
| 8EN7-FE-4 | FE | Fe³⁺ | H4 | HIS. | HIS. | ✔ | 4 | 4 | 4 | ✘ |
| 8EN7-FE-5 | FE | Fe³⁺ | H4 | HIS. | HIS. | ✔ | 4 | 4 | 4 | ✘ |
| 8EN7-FE-6 | FE | Fe³⁺ | H4 | HIS. | HIS. | ✔ | 4 | 4 | 4 | ✘ |