| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4Z9N-NA-1 | NA | Na⁺ | D3L1Q1 | ASP.GLN.LEU. | ASP.GLN.LEU. | ✔ | 5 | 5 | 2 | ✔ |
| 4Z9N-NA-2 | NA | Na⁺ | D3L1Q1 | ASP.GLN.LEU. | ASP.GLN.LEU. | ✔ | 5 | 5 | 2 | ✘ |