| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4US5-NA-2 | NA | Na⁺ | E1H1N1S1 | ASN.GLU.HIS.SER. | ASN.GLU.HIS.SER. | ✘ | 4 | 4 | 2 | ✘ |