| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 5OWO-CA-1 | CA | Ca²⁺ | E2N2 | ASN.GLU. | ASN.GLU.HOH. | ✔ | 4 | 6 | 2 | ✔ |
| 7C7I-CA-1 | CA | Ca²⁺ | E2N2 | ASN.GLU. | ASN.GLU.HOH. | ✔ | 4 | 6 | 2 | ✔ |