| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3C9I-CA-1 | CA | Ca²⁺ | N3Q3 | ASN.GLN. | ASN.GLN. | ✔ | 6 | 6 | 3 | ✔ |
| 5BU8-CA-1 | CA | Ca²⁺ | N3Q3 | ASN.GLN. | ASN.GLN. | ✔ | 6 | 6 | 3 | ✘ |
| 5BVZ-CA-1 | CA | Ca²⁺ | N3Q3 | ASN.GLN. | ASN.GLN. | ✔ | 6 | 6 | 3 | ✘ |
| 4ZKU-CA-1 | CA | Ca²⁺ | N3Q3 | ASN.GLN. | ASN.GLN. | ✔ | 6 | 6 | 3 | ✘ |
| 4ZXQ-CA-1 | CA | Ca²⁺ | N3Q3 | ASN.GLN. | ASN.GLN. | ✔ | 6 | 6 | 3 | ✔ |
| 4ZKP-CA-1 | CA | Ca²⁺ | N3Q3 | ASN.GLN. | ASN.GLN. | ✔ | 6 | 6 | 3 | ✘ |