| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 6DBO-CA-1 | CA | Ca²⁺ | A1C1D1 | ASP.DA.DC. | ASP.DA.DC. | ✘ | 3 | 3 | 2 | ✔ |
| 6DBO-CA-2 | CA | Ca²⁺ | A1C1D1 | ASP.DA.DC. | ASP.DA.DC. | ✘ | 3 | 3 | 2 | ✔ |
| 6DBR-CA-1 | CA | Ca²⁺ | A1C1D1 | ASP.DA.DC. | ASP.DA.DC. | ✘ | 3 | 3 | 2 | ✔ |
| 6EKO-CA-1 | CA | Ca²⁺ | A1C1D1 | ALA.ASP.DC. | ALA.ASP.DC.HOH. | ✘ | 3 | 5 | 2 | ✔ |
| 6EKO-CA-2 | CA | Ca²⁺ | A1C1D1 | ALA.ASP.DC. | ALA.ASP.DC.HOH. | ✘ | 3 | 5 | 2 | ✘ |