| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 6WXF-CA-1 | CA | Ca²⁺ | D3 | ASP. | ASP. | ✔ | 3 | 3 | 2 | ✘ |
| 6WXF-CA-9 | CA | Ca²⁺ | D3 | ASP. | ASP. | ✔ | 3 | 3 | 2 | ✘ |
| 6WXF-CA-14 | CA | Ca²⁺ | D3 | ASP. | ASP. | ✔ | 3 | 3 | 2 | ✘ |
| 6WXF-CA-18 | CA | Ca²⁺ | D3 | ASP. | ASP. | ✔ | 3 | 3 | 2 | ✘ |
| 6WZ1-CA-4 | CA | Ca²⁺ | D3 | ASP. | ASP.HOH. | ✔ | 3 | 5 | 2 | ✔ |
| 6WYH-CA-19 | CA | Ca²⁺ | D3 | ASP. | ASP.HOH. | ✔ | 3 | 6 | 3 | ✘ |
| 6WYH-CA-20 | CA | Ca²⁺ | D3 | ASP. | ASP.HOH. | ✔ | 3 | 6 | 3 | ✘ |
| 6H6U-CA-1 | CA | Ca²⁺ | D3 | ASP. | ASP. | ✔ | 3 | 3 | 3 | ✔ |
| 6H6U-CA-2 | CA | Ca²⁺ | D3 | ASP. | ASP. | ✔ | 3 | 3 | 3 | ✘ |
| 6H6U-CA-3 | CA | Ca²⁺ | D3 | ASP. | ASP. | ✔ | 3 | 3 | 3 | ✘ |
| 6H6U-CA-4 | CA | Ca²⁺ | D3 | ASP. | ASP. | ✔ | 3 | 3 | 3 | ✘ |
| 6H6U-CA-13 | CA | Ca²⁺ | D3 | ASP. | ASP. | ✔ | 3 | 3 | 3 | ✘ |
| 6H6U-CA-14 | CA | Ca²⁺ | D3 | ASP. | ASP. | ✔ | 3 | 3 | 3 | ✘ |
| 6H6U-CA-15 | CA | Ca²⁺ | D3 | ASP. | ASP. | ✔ | 3 | 3 | 3 | ✘ |
| 6H6U-CA-16 | CA | Ca²⁺ | D3 | ASP. | ASP. | ✔ | 3 | 3 | 3 | ✘ |
| 6HK9-CA-1 | CA | Ca²⁺ | D3 | ASP. | ASP.HOH. | ✔ | 3 | 6 | 2 | ✔ |
| 6HK9-CA-2 | CA | Ca²⁺ | D3 | ASP. | ASP.HOH. | ✔ | 3 | 6 | 2 | ✘ |
| 1GUN-CA-1 | CA | Ca²⁺ | D3 | ASP. | ASP.HOH. | ✔ | 3 | 9 | 3 | ✘ |
| 1GUN-CA-2 | CA | Ca²⁺ | D3 | ASP. | ASP.HOH. | ✔ | 3 | 9 | 3 | ✘ |
| 1MPR-CA-1 | CA | Ca²⁺ | D3 | ASP. | ASP. | ✔ | 3 | 3 | 3 | ✘ |