| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3IA7-CA-1 | CA | Ca²⁺ | E1L1Q1 | GLN.GLU.LEU. | GLN.GLU.HOH.LEU. | ✔ | 3 | 5 | 2 | ✔ |
| 3IA7-CA-2 | CA | Ca²⁺ | E1L1Q1 | GLN.GLU.LEU. | GLN.GLU.HOH.LEU. | ✔ | 3 | 5 | 2 | ✘ |