| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3BS6-CA-1 | CA | Ca²⁺ | E3Y2 | GLU.TYR. | GLU.HOH.TYR. | ✔ | 5 | 7 | 2 | ✔ |
| 3BS6-CA-2 | CA | Ca²⁺ | E3Y2 | GLU.TYR. | GLU.HOH.TYR. | ✔ | 5 | 7 | 2 | ✘ |