| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1G1J-SR-1 | SR | Sr²⁺ | E2Q4 | GLN.GLU. | GLN.GLU.HOH. | ✔ | 6 | 8 | 4 | ✘ |