| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2Z8F-NA-1 | NA | Na⁺ | D2E1 | ASP.GLU. | ASP.GLU.HOH. | ✔ | 3 | 6 | 2 | ✔ |
| 2Z8F-NA-2 | NA | Na⁺ | D2E1 | ASP.GLU. | ASP.GLU.HOH. | ✔ | 3 | 6 | 2 | ✔ |
| 3FL7-NA-1 | NA | Na⁺ | D2E1 | ASP.GLU. | ASP.GLU. | ✔ | 3 | 3 | 2 | ✔ |
| 3FL7-NA-2 | NA | Na⁺ | D2E1 | ASP.GLU. | ASP.GLU. | ✔ | 3 | 3 | 2 | ✘ |