| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 6OEO-CA-3 | CA | Ca²⁺ | C1D2 | ASP.DC. | ASP.DC. | ✘ | 3 | 3 | 2 | ✔ |
| 6OER-CA-1 | CA | Ca²⁺ | C1D2 | ASP.DC. | ASP.DC. | ✘ | 3 | 3 | 2 | ✘ |
| 4F4Y-CA-1 | CA | Ca²⁺ | C1D2 | ASP.DC. | ASP.DCP.PHE. | ✘ | 3 | 3 | 2 | ✔ |
| 5UGO-CA-1 | CA | Ca²⁺ | C1D2 | ASP.DC. | 2PN.ASP.DC.HOH. | ✘ | 3 | 5 | 2 | ✔ |