| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4OEH-NA-2 | NA | Na⁺ | E2I1 | GLU.ILE. | GLU.ILE. | ✔ | 3 | 3 | 2 | ✘ |
| 5C80-NA-2 | NA | Na⁺ | E2I1 | GLU.ILE. | GLU.ILE. | ✔ | 3 | 3 | 2 | ✘ |