| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1KKM-CA-1 | CA | Ca²⁺ | E1S1X1 | GLU.SEP.SER. | GLU.SEP.SER. | ✘ | 3 | 3 | 2 | ✔ |
| 1KKM-CA-2 | CA | Ca²⁺ | E1S1X1 | GLU.SEP.SER. | GLU.SEP.SER. | ✘ | 3 | 3 | 2 | ✘ |
| 1KKM-CA-3 | CA | Ca²⁺ | E1S1X1 | GLU.SEP.SER. | GLU.HOH.SEP.SER. | ✘ | 3 | 4 | 2 | ✘ |
| 1KKM-CA-4 | CA | Ca²⁺ | E1S1X1 | GLU.SEP.SER. | GLU.HOH.SEP.SER. | ✘ | 3 | 4 | 2 | ✘ |
| 1KKM-CA-5 | CA | Ca²⁺ | E1S1X1 | GLU.SEP.SER. | GLU.HOH.SEP.SER. | ✘ | 3 | 4 | 2 | ✘ |
| 1KKM-CA-6 | CA | Ca²⁺ | E1S1X1 | GLU.SEP.SER. | GLU.HOH.SEP.SER. | ✘ | 3 | 4 | 2 | ✘ |