| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2RAQ-CA-3 | CA | Ca²⁺ | D1E1S1 | ASP.GLU.SER. | ASP.GLU.SER. | ✔ | 3 | 3 | 2 | ✘ |
| 2RAQ-CA-4 | CA | Ca²⁺ | D1E1S1 | ASP.GLU.SER. | ASP.GLU.SER. | ✔ | 3 | 3 | 2 | ✘ |
| 2RAQ-CA-23 | CA | Ca²⁺ | D1E1S1 | ASP.GLU.SER. | ASP.GLU.SER. | ✔ | 3 | 3 | 2 | ✔ |
| 2RAQ-CA-24 | CA | Ca²⁺ | D1E1S1 | ASP.GLU.SER. | ASP.GLU.SER. | ✔ | 3 | 3 | 2 | ✘ |