| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3GIJ-CA-1 | CA | Ca²⁺ | D1E1X1 | 2DA.ASP.GLU. | 2DA.ASP.GLU.HOH. | ✘ | 3 | 5 | 2 | ✔ |
| 3KHL-CA-1 | CA | Ca²⁺ | D1E1X1 | ASP.DDG.GLU. | ASP.DDG.GLU.HOH. | ✘ | 3 | 5 | 2 | ✔ |
| 2ASD-CA-1 | CA | Ca²⁺ | D1E1X1 | ASP.DDG.GLU. | HOH. | ✘ | 3 | 6 | 2 | ✔ |
| 2ATL-CA-1 | CA | Ca²⁺ | D1E1X1 | ASP.DDG.GLU. | ASP.DDG.GLU.HOH. | ✘ | 3 | 5 | 2 | ✘ |
| 2AU0-CA-1 | CA | Ca²⁺ | D1E1X1 | ASP.DDG.GLU. | ASP.DDG.GLU.HOH. | ✘ | 3 | 5 | 2 | ✔ |
| 4QWB-CA-1 | CA | Ca²⁺ | D1E1X1 | ASP.DOC.GLU. | ASP.DOC.GLU.HOH. | ✘ | 3 | 6 | 2 | ✔ |
| 7PIV-CA-1 | CA | Ca²⁺ | D1E1X1 | ASP.DPN.GLU. | ASP.DPN.GLU. | ✘ | 3 | 3 | 2 | ✔ |