| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4MKK-NA-1 | NA | Na⁺ | D1S1T1 | ASP.SER.THR. | ASP.SER.THR. | ✔ | 3 | 3 | 2 | ✔ |
| 4MKK-NA-2 | NA | Na⁺ | D1S1T1 | ASP.SER.THR. | ASP.SER.THR. | ✔ | 3 | 3 | 2 | ✔ |
| 4MKK-NA-3 | NA | Na⁺ | D1S1T1 | ASP.SER.THR. | ASP.SER.THR. | ✔ | 3 | 3 | 2 | ✔ |
| 4MKK-NA-4 | NA | Na⁺ | D1S1T1 | ASP.SER.THR. | ASP.SER.THR. | ✔ | 3 | 3 | 2 | ✘ |
| 6D1P-NA-1 | NA | Na⁺ | D1S1T1 | ASP.SER.THR. | ASP.HOH.SER.THR. | ✔ | 3 | 4 | 2 | ✔ |