| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1O9I-CA-1 | CA | Ca²⁺ | D2G1N1S1 | ASN.ASP.GLY.SER. | ASN.ASP.GLY.HOH.SER. | ✔ | 5 | 6 | 2 | ✔ |
| 1O9I-CA-2 | CA | Ca²⁺ | D2G1N1S1 | ASN.ASP.GLY.SER. | ASN.ASP.GLY.HOH.SER. | ✔ | 5 | 6 | 2 | ✔ |
| 1O9I-CA-3 | CA | Ca²⁺ | D2G1N1S1 | ASN.ASP.GLY.SER. | ASN.ASP.GLY.HOH.SER. | ✔ | 5 | 6 | 2 | ✘ |
| 1O9I-CA-4 | CA | Ca²⁺ | D2G1N1S1 | ASN.ASP.GLY.SER. | ASN.ASP.GLY.HOH.SER. | ✔ | 5 | 6 | 2 | ✘ |
| 1O9I-CA-5 | CA | Ca²⁺ | D2G1N1S1 | ASN.ASP.GLY.SER. | ASN.ASP.GLY.HOH.SER. | ✔ | 5 | 6 | 2 | ✘ |
| 1O9I-CA-6 | CA | Ca²⁺ | D2G1N1S1 | ASN.ASP.GLY.SER. | ASN.ASP.GLY.HOH.SER. | ✔ | 5 | 6 | 2 | ✔ |