| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1QI2-CA-1 | CA | Ca²⁺ | D1E2 | ASP.GLU. | ASP.GLU.HOH. | ✔ | 3 | 4 | 2 | ✔ |
| 1QI2-CA-2 | CA | Ca²⁺ | D1E2 | ASP.GLU. | ASP.GLU.HOH. | ✔ | 3 | 4 | 2 | ✘ |
| 1RE4-CA-1 | CA | Ca²⁺ | E1G1 | GLU.GLY. | GLU.GLY. | ✘ | 2 | 2 | 2 | ✔ |
| 1RGI-CA-1 | CA | Ca²⁺ | A1D1E1G1 | ALA.ASP.GLU.GLY. | ALA.ASP.GLU.GLY.HOH. | ✘ | 4 | 5 | 2 | ✘ |
| 1Y6P-CA-1 | CA | Ca²⁺ | E4S2 | GLU.SER. | GLU.SER. | ✔ | 6 | 6 | 2 | ✘ |
| 1Y7O-CA-1 | CA | Ca²⁺ | A1I1S1X1 | ALA.ILE.MSE.SER. | ALA.ILE.MSE.SER. | ✔ | 4 | 4 | 2 | ✔ |
| 1Y7O-CA-2 | CA | Ca²⁺ | A1I1S1X1 | ALA.ILE.MSE.SER. | ALA.ILE.MSE.SER. | ✔ | 4 | 4 | 2 | ✘ |
| 1YAX-CA-1 | CA | Ca²⁺ | E2 | GLU. | GLU.HOH. | ✔ | 2 | 4 | 2 | ✔ |
| 1YAX-CA-2 | CA | Ca²⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 5 | 2 | ✔ |
| 1YAX-CA-3 | CA | Ca²⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 5 | 2 | ✔ |
| 1YAX-CA-4 | CA | Ca²⁺ | E3 | GLU. | GLU.HOH. | ✔ | 3 | 5 | 2 | ✘ |
| 1Z1C-CA-1 | CA | Ca²⁺ | C2N1T2 | ASN.DC.DT. | ASN.DC.DT. | ✘ | 5 | 5 | 2 | ✔ |
| 1Z1C-CA-2 | CA | Ca²⁺ | C2N1T2 | ASN.DC.DT. | ASN.DC.DT. | ✘ | 5 | 5 | 2 | ✘ |
| 1Z1C-CA-3 | CA | Ca²⁺ | C2N1T2 | ASN.DC.DT. | ASN.DC.DT. | ✘ | 5 | 5 | 2 | ✘ |
| 1Z1C-CA-4 | CA | Ca²⁺ | C2N1T2 | ASN.DC.DT. | ASN.DC.DT. | ✘ | 5 | 5 | 2 | ✘ |
| 1Z1C-CA-5 | CA | Ca²⁺ | C2N1T2 | ASN.DC.DT. | ASN.DC.DT. | ✘ | 5 | 5 | 2 | ✘ |
| 1Z1C-CA-6 | CA | Ca²⁺ | C2N1T2 | ASN.DC.DT. | ASN.DC.DT. | ✘ | 5 | 5 | 2 | ✘ |
| 1Z1C-CA-7 | CA | Ca²⁺ | C2N1T2 | ASN.DC.DT. | ASN.DC.DT. | ✘ | 5 | 5 | 2 | ✘ |
| 1Z1C-CA-8 | CA | Ca²⁺ | C2N1T2 | ASN.DC.DT. | ASN.DC.DT. | ✘ | 5 | 5 | 2 | ✘ |
| 1Z1C-CA-9 | CA | Ca²⁺ | C2N1T2 | ASN.DC.DT. | ASN.DC.DT. | ✘ | 5 | 5 | 2 | ✘ |