| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 6THO-CA-1 | CA | Ca²⁺ | E2N1 | ASN.GLU. | ASP.GLU.HOH. | ✔ | 3 | 6 | 2 | ✔ |
| 6TVS-CA-1 | CA | Ca²⁺ | E2N1 | ASN.GLU. | ASN.GLU.HOH.NAG. | ✘ | 3 | 6 | 3 | ✔ |
| 6TVR-CA-1 | CA | Ca²⁺ | E2N1 | ASN.GLU. | ASN.GLU.HOH.NAG. | ✘ | 3 | 5 | 3 | ✘ |
| 6TVF-CA-2 | CA | Ca²⁺ | E2N1 | ASN.GLU. | ASN.GLU.HOH.NAG. | ✘ | 3 | 5 | 3 | ✘ |
| 6TWV-CA-1 | CA | Ca²⁺ | E2N1 | ASN.GLU. | ASN.GLU.NAG. | ✘ | 3 | 4 | 3 | ✘ |
| 6TWI-CA-3 | CA | Ca²⁺ | E2N1 | ASN.GLU. | ASN.GLU.HOH.NAG. | ✘ | 3 | 6 | 3 | ✘ |
| 6TWH-CA-2 | CA | Ca²⁺ | E2N1 | ASN.GLU. | ASN.GLU.NAG. | ✘ | 3 | 4 | 3 | ✘ |