| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 5EMG-NA-1 | NA | Na⁺ | X3 | GPN.TPN. | GPN.HOH.TPN. | ✔ | 3 | 5 | 2 | ✔ |
| 4L0A-K-2 | K | K⁺ | X3 | LCG.TLN. | LCG.TLN. | ✔ | 3 | 3 | 3 | ✘ |
| 5XUV-AG-3 | AG | Ag⁺ | X3 | 8RO. | 8RO. | ✔ | 3 | 3 | 2 | ✔ |
| 3PBJ-HG-1 | HG | Hg²⁺ | X3 | LE1. | LE1. | ✔ | 3 | 3 | 3 | ✔ |
| 2DPR-CA-1 | CA | Ca²⁺ | X3 | CGU. | CGU.HOH. | ✔ | 3 | 4 | 2 | ✔ |
| 2DPR-CA-4 | CA | Ca²⁺ | X3 | CGU. | CGU.HOH. | ✔ | 3 | 4 | 2 | ✔ |
| 1Q8H-CA-1 | CA | Ca²⁺ | X3 | CGU. | CGU.HOH. | ✔ | 3 | 4 | 2 | ✔ |
| 1Q8H-CA-2 | CA | Ca²⁺ | X3 | CGU. | CGU.HOH. | ✔ | 3 | 4 | 2 | ✘ |
| 5EIL-FE-1 | FE | Fe³⁺ | X3 | BP5. | BP5. | ✔ | 3 | 3 | 3 | ✔ |