| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 6EGO-HG-1 | HG | Hg²⁺ | C3 | CYS. | CYS. | ✔ | 3 | 3 | 3 | ✘ |
| 5CRL-HG-1 | HG | Hg²⁺ | C3 | CYS. | CYS. | ✔ | 3 | 3 | 2 | ✔ |
| 5CRL-HG-2 | HG | Hg²⁺ | C3 | CYS. | CYS. | ✔ | 3 | 3 | 2 | ✘ |
| 4UA1-HG-1 | HG | Hg²⁺ | C3 | CYS. | CYS. | ✔ | 3 | 3 | 2 | ✔ |
| 4UA1-HG-2 | HG | Hg²⁺ | C3 | CYS. | CYS. | ✔ | 3 | 3 | 2 | ✘ |