| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3ENZ-NA-1 | NA | Na⁺ | E2V2 | GLU.VAL. | GLU.HOH.VAL. | ✔ | 4 | 6 | 2 | ✘ |
| 3ENZ-NA-2 | NA | Na⁺ | E2V2 | GLU.VAL. | GLU.HOH.VAL. | ✔ | 4 | 6 | 2 | ✔ |
| 3ENZ-NA-3 | NA | Na⁺ | E2V2 | GLU.VAL. | GLU.HOH.VAL. | ✔ | 4 | 6 | 2 | ✘ |
| 3TL3-NA-1 | NA | Na⁺ | E2V2 | GLU.VAL. | GLU.HOH.VAL. | ✔ | 4 | 6 | 2 | ✔ |
| 3TL3-NA-2 | NA | Na⁺ | E2V2 | GLU.VAL. | GLU.HOH.VAL. | ✔ | 4 | 6 | 2 | ✘ |