| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3PZA-FE-1 | FE | Fe²⁺ | E3 | GLU. | GLU.PEO. | ✔ | 3 | 4 | 2 | ✔ |
| 3QVD-FE-1 | FE | Fe²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✔ |
| 3QVD-FE-2 | FE | Fe²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✔ |
| 6LPD-FE-1 | FE | Fe²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 6LPD-FE-2 | FE | Fe²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 6LPD-FE-3 | FE | Fe²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 6LPD-FE-4 | FE | Fe²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 4DI0-FE-1 | FE | Fe³⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 4 | 2 | ✘ |
| 4DI0-FE-2 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✘ |
| 4DI0-FE-3 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✔ |
| 3RBC-FE-1 | FE | Fe³⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 4 | 3 | ✘ |
| 3RBC-FE-2 | FE | Fe³⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 4 | 3 | ✘ |
| 3MPS-FE-6 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✘ |
| 3MPS-FE-8 | FE | Fe³⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 4 | 2 | ✘ |
| 2HR5-FE-1 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✘ |
| 2HR5-FE-2 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✘ |
| 2HR5-FE-3 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✔ |
| 2HR5-FE-4 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✘ |
| 2HR5-FE-5 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✔ |
| 2HR5-FE-6 | FE | Fe³⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✘ |