| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2AIG-CA-1 | CA | Ca²⁺ | C1D1E1N1Q1 | ASN.ASP.CYS.GLN.GLU. | ASN.ASP.CYS.GLN.GLU.HOH. | ✔ | 5 | 6 | 2 | ✔ |
| 2AIG-CA-2 | CA | Ca²⁺ | C1D1E1N1Q1 | ASN.ASP.CYS.GLN.GLU. | ASN.ASP.CYS.GLN.GLU.HOH. | ✔ | 5 | 6 | 2 | ✔ |