| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1TX3-NA-1 | NA | Na⁺ | D1G1I1 | ASP.DG.ILE. | ASP.DG.HOH.ILE. | ✘ | 3 | 5 | 2 | ✔ |
| 1TX3-NA-2 | NA | Na⁺ | D1G1I1 | ASP.DG.ILE. | ASP.DG.HOH.ILE. | ✘ | 3 | 5 | 2 | ✘ |
| 2GIG-NA-2 | NA | Na⁺ | D1G1I1 | ASP.DG.ILE. | ASP.DG.HOH.ILE. | ✘ | 3 | 5 | 2 | ✔ |
| 1KC6-NA-1 | NA | Na⁺ | D1G1I1 | ASP.DG.ILE. | ASP.DG.HOH.ILE. | ✘ | 3 | 5 | 2 | ✔ |
| 1KC6-NA-2 | NA | Na⁺ | D1G1I1 | ASP.DG.ILE. | ASP.DG.HOH.ILE. | ✘ | 3 | 5 | 2 | ✘ |
| 2A0Q-K-1 | K | K⁺ | D1G1I1 | ASP.GLY.ILE. | ASP.GLY.HOH.ILE. | ✔ | 3 | 6 | 2 | ✔ |