| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 7FHL-CA-2 | CA | Ca²⁺ | D2E1 | ASP.GLU. | ASP.GLU. | ✔ | 3 | 3 | 2 | ✘ |
| 7FHK-CA-1 | CA | Ca²⁺ | D2E1 | ASP.GLU. | ASP.GLU. | ✔ | 3 | 3 | 2 | ✔ |
| 7F05-CA-6 | CA | Ca²⁺ | D2E1 | ASP.GLU. | ASP.GLU.HOH. | ✔ | 3 | 6 | 2 | ✔ |
| 7F05-CA-9 | CA | Ca²⁺ | D2E1 | ASP.GLU. | ASP.HOH. | ✔ | 3 | 2 | 2 | ✔ |
| 8GY7-CA-1 | CA | Ca²⁺ | D2E1 | ASP.GLU. | ASP.GLU. | ✘ | 3 | 3 | 2 | ✔ |