| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3ZK2-NA-10 | NA | Na⁺ | E2S1V1 | GLU.SER.VAL. | GLU.HOH.SER.VAL. | ✔ | 4 | 5 | 2 | ✔ |
| 3ZK2-NA-11 | NA | Na⁺ | E2S1V1 | GLU.SER.VAL. | GLU.HOH.SER.VAL. | ✔ | 4 | 5 | 2 | ✔ |