| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3R1I-MG-1 | MG | Mg²⁺ | P2 | PRO. | HOH.PRO. | ✔ | 2 | 6 | 2 | ✔ |
| 3R1I-MG-2 | MG | Mg²⁺ | P2 | PRO. | HOH.PRO. | ✔ | 2 | 6 | 2 | ✘ |
| 4PLS-CA-9 | CA | Ca²⁺ | P2 | PRO. | PRO. | ✔ | 2 | 2 | 2 | ✔ |
| 6DUC-CS-1 | CS | Cs⁺ | P2 | PRO. | PRO. | ✔ | 2 | 2 | 2 | ✔ |
| 7DLD-MG-1 | MG | Mg²⁺ | P2 | PRO. | HOH.PRO. | ✔ | 2 | 6 | 2 | ✔ |
| 7DLD-MG-2 | MG | Mg²⁺ | P2 | PRO. | HOH.PRO. | ✔ | 2 | 5 | 2 | ✘ |