| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4IIE-NA-1 | NA | Na⁺ | N1X1 | ASN.NAG. | ASN.HOH.NAG. | ✘ | 2 | 4 | 2 | ✔ |
| 4IIE-NA-2 | NA | Na⁺ | N1X1 | ASN.NAG. | ASN.HOH.NAG. | ✘ | 2 | 4 | 2 | ✔ |
| 4IIB-NA-1 | NA | Na⁺ | N1X1 | ASN.NAG. | ASN.HOH.NAG. | ✘ | 2 | 4 | 2 | ✔ |
| 4IIB-NA-2 | NA | Na⁺ | N1X1 | ASN.NAG. | ASN.HOH.NAG. | ✘ | 2 | 4 | 2 | ✔ |
| 4IIC-NA-1 | NA | Na⁺ | N1X1 | ASN.NAG. | ASN.HOH.NAG. | ✘ | 2 | 4 | 2 | ✔ |
| 4IIC-NA-2 | NA | Na⁺ | N1X1 | ASN.NAG. | ASN.HOH.NAG. | ✘ | 2 | 4 | 2 | ✔ |
| 6KKO-NA-1 | NA | Na⁺ | N1X1 | ASN.TPO. | ADP.ASN.TPO. | ✘ | 2 | 3 | 2 | ✔ |
| 6KKO-NA-2 | NA | Na⁺ | N1X1 | ASN.TPO. | ADP.ASN.TPO. | ✘ | 2 | 3 | 2 | ✘ |
| 7OGU-NA-2 | NA | Na⁺ | N1X1 | ASN.NAG. | ASN.NAG. | ✘ | 2 | 2 | 2 | ✔ |