| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 5UC6-NA-1 | NA | Na⁺ | D2X1 | 85Y.ASP. | 85Y.ASP.HOH. | ✘ | 3 | 6 | 2 | ✔ |
| 6QMQ-NA-1 | NA | Na⁺ | D2X1 | ACE.ASP. | ACE.ASP. | ✘ | 3 | 3 | 2 | ✔ |