| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 6RX8-NA-1 | NA | Na⁺ | E2 | GLU. | GLU.HOH. | ✔ | 2 | 4 | 2 | ✔ |
| 6RX8-NA-2 | NA | Na⁺ | E2 | GLU. | GLU.HOH. | ✔ | 2 | 4 | 2 | ✘ |
| 6Y8O-NA-1 | NA | Na⁺ | E2 | GLU. | GLU.HOH. | ✔ | 2 | 3 | 2 | ✔ |
| 1TKO-NA-1 | NA | Na⁺ | E2 | GLU. | GLU. | ✔ | 2 | 2 | 2 | ✔ |
| 1TKO-NA-2 | NA | Na⁺ | E2 | GLU. | GLU. | ✔ | 2 | 2 | 2 | ✔ |
| 1TKO-NA-3 | NA | Na⁺ | E2 | GLU. | GLU. | ✔ | 2 | 2 | 2 | ✔ |
| 1TKO-NA-4 | NA | Na⁺ | E2 | GLU. | GLU. | ✔ | 2 | 2 | 2 | ✘ |
| 1UTX-NA-1 | NA | Na⁺ | E2 | GLU. | GLU. | ✔ | 2 | 2 | 2 | ✔ |