| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4HLS-NA-1 | NA | Na⁺ | E2T2 | GLU.THR. | GLU.THR. | ✔ | 4 | 4 | 2 | ✔ |
| 6T5X-NA-1 | NA | Na⁺ | E2T2 | GLU.THR. | GLU.HOH.THR. | ✔ | 4 | 6 | 2 | ✔ |
| 6T5X-NA-2 | NA | Na⁺ | E2T2 | GLU.THR. | GLU.HOH.THR. | ✔ | 4 | 6 | 2 | ✘ |