| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4YZX-CA-1 | CA | Ca²⁺ | E1N1Q1X1 | ADA.ASN.GLN.GLU. | ADA.ASN.GLN.GLU.HOH. | ✘ | 4 | 6 | 2 | ✔ |