| 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 | ✘ |
| 1NNQ-ZN-1 | ZN | Zn²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✔ |
| 1NNQ-ZN-2 | ZN | Zn²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✘ |
| 1U7J-ZN-1 | ZN | Zn²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✔ |
| 2EK0-ZN-1 | ZN | Zn²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 2 | ✔ |
| 2AKF-ZN-1 | ZN | Zn²⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 4 | 3 | ✔ |
| 2CHI-CA-25 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 2CHI-CA-26 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 2CHI-CA-27 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 2CHI-CA-28 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 2CHI-CA-29 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 2CHI-CA-30 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 2CHI-CA-31 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |
| 2CHI-CA-32 | CA | Ca²⁺ | E3 | GLU. | GLU. | ✔ | 3 | 3 | 3 | ✘ |