| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4LCZ-NA-1 | NA | Na⁺ | E1S1 | GLU.SER. | GLU.HOH.SER. | ✔ | 2 | 3 | 2 | ✔ |
| 6Z02-NA-1 | NA | Na⁺ | E1S1 | GLU.SER. | GLU.HOH.SER. | ✘ | 2 | 3 | 2 | ✔ |