| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 6H2B-CA-60 | CA | Ca²⁺ | D2N1 | ASN.ASP. | ASN.ASP. | ✔ | 3 | 3 | 2 | ✘ |
| 7KLD-CA-3 | CA | Ca²⁺ | D2N1 | ASN.ASP. | ASN.ASP. | ✔ | 3 | 3 | 2 | ✔ |
| 7KLD-CA-4 | CA | Ca²⁺ | D2N1 | ASN.ASP. | ASN.ASP. | ✔ | 3 | 3 | 2 | ✔ |
| 7KLD-CA-7 | CA | Ca²⁺ | D2N1 | ASN.ASP. | ASN.ASP.HOH. | ✔ | 3 | 4 | 2 | ✘ |
| 7KLD-CA-8 | CA | Ca²⁺ | D2N1 | ASN.ASP. | ASN.ASP.HOH. | ✔ | 3 | 4 | 2 | ✘ |
| 7KLD-CA-9 | CA | Ca²⁺ | D2N1 | ASN.ASP. | ASN.ASP.HOH. | ✔ | 3 | 4 | 2 | ✘ |
| 7KLD-CA-10 | CA | Ca²⁺ | D2N1 | ASN.ASP. | ASN.ASP.HOH. | ✔ | 3 | 4 | 2 | ✔ |