| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4Z6D-NA-1 | NA | Na⁺ | C1K1 | DC.LYS. | DC.LYS. | ✘ | 2 | 2 | 2 | ✔ |
| 4EBE-CA-1 | CA | Ca²⁺ | C1K1 | DC.LYS. | DC.HOH.LYS. | ✘ | 2 | 3 | 2 | ✔ |