| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3MXI-CA-3 | CA | Ca²⁺ | C1G1N1 | ASN.DC.DG. | ASN.DC.DG.HOH. | ✘ | 3 | 5 | 2 | ✔ |
| 3MXI-CA-4 | CA | Ca²⁺ | C1G1N1 | ASN.DC.DG. | ASN.DC.DG.HOH. | ✘ | 3 | 6 | 2 | ✘ |