| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1Z6O-CA-1 | CA | Ca²⁺ | E3Q3 | GLN.GLU. | GLN.GLU. | ✔ | 6 | 6 | 3 | ✔ |
| 1Z6O-CA-2 | CA | Ca²⁺ | E3Q3 | GLN.GLU. | HOH. | ✔ | 6 | 4 | 3 | ✔ |
| 1Z6O-CA-3 | CA | Ca²⁺ | E3Q3 | GLN.GLU. | GLN.GLU. | ✔ | 6 | 6 | 3 | ✔ |
| 1Z6O-CA-4 | CA | Ca²⁺ | E3Q3 | GLN.GLU. | HOH. | ✔ | 6 | 4 | 3 | ✘ |