| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 5OUR-NA-2 | NA | Na⁺ | E2I1S2 | GLU.ILE.SER. | GLU.ILE.SER. | ✔ | 5 | 5 | 2 | ✘ |
| 5OUR-NA-3 | NA | Na⁺ | E2I1S2 | GLU.ILE.SER. | GLU.ILE.SER. | ✔ | 5 | 5 | 2 | ✘ |
| 5LHV-NA-2 | NA | Na⁺ | E2I1S2 | GLU.ILE.SER. | GLU.ILE.SER. | ✔ | 5 | 5 | 2 | ✘ |
| 5LHV-NA-3 | NA | Na⁺ | E2I1S2 | GLU.ILE.SER. | GLU.ILE.SER. | ✔ | 5 | 5 | 2 | ✔ |
| 6RCA-NA-3 | NA | Na⁺ | E2I1S2 | GLU.ILE.SER. | GLU.ILE.SER. | ✔ | 5 | 5 | 2 | ✔ |
| 4OEH-NA-3 | NA | Na⁺ | E2I1S2 | GLU.ILE.SER. | GLU.ILE.SER. | ✔ | 5 | 5 | 2 | ✘ |
| 5C80-NA-1 | NA | Na⁺ | E2I1S2 | GLU.ILE.SER. | GLU.ILE.SER. | ✔ | 5 | 5 | 2 | ✔ |
| 1RXU-K-1 | K | K⁺ | E2I1S2 | GLU.ILE.SER. | GLU.ILE.SER. | ✔ | 5 | 5 | 2 | ✘ |