| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4MPR-CA-1 | CA | Ca²⁺ | L2N2R2 | ARG.ASN.LEU. | ARG.ASN.LEU. | ✔ | 6 | 6 | 2 | ✘ |
| 4MPR-CA-2 | CA | Ca²⁺ | L2N2R2 | ARG.ASN.LEU. | ARG.ASN.LEU. | ✔ | 6 | 6 | 2 | ✔ |
| 4MQ5-CA-1 | CA | Ca²⁺ | L2N2R2 | ARG.ASN.LEU. | ARG.ASN.LEU. | ✔ | 6 | 6 | 2 | ✘ |
| 4MQ5-CA-2 | CA | Ca²⁺ | L2N2R2 | ARG.ASN.LEU. | ARG.ASN.LEU. | ✔ | 6 | 6 | 2 | ✘ |