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
1DR4-CA-1	CA	Ca²⁺	E2	GLU.	GLU.HOH.NAP.	✔	2	6	2	✔
1DR3-CA-1	CA	Ca²⁺	E2	GLU.	GLU.HOH.TAP.	✔	2	6	2	✘
1DR2-CA-1	CA	Ca²⁺	E2	GLU.	GLU.HOH.TAP.	✔	2	6	2	✘
1DR1-CA-1	CA	Ca²⁺	E2	GLU.	GLU.HOH.NAP.	✔	2	6	2	✔
1E3A-CA-1	CA	Ca²⁺	D3E1P1V1	ASP.GLU.PRO.VAL.	ASP.GLU.PRO.VAL.	✘	6	6	2	✘
1E54-CA-1	CA	Ca²⁺	D1E1G1L1N1	ASN.ASP.GLU.GLY.LEU.	ASN.ASP.GLU.GLY.LEU.	✔	5	5	2	✘
1E54-CA-2	CA	Ca²⁺	D1E1G1L1N1	ASN.ASP.GLU.GLY.LEU.	ASN.ASP.GLU.GLY.LEU.	✔	5	5	2	✘
1E54-CA-3	CA	Ca²⁺	D1E1G1L1N1	ASN.ASP.GLU.GLY.LEU.	ASN.ASP.GLU.GLY.LEU.	✔	5	5	2	✘
7NEF-CA-1	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASP.GLU.ZDC.	✔	5	5	2	✘
7NEF-CA-2	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.GLY.ZDC.	✔	5	6	2	✘
7NEF-CA-3	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASP.GLU.ZDC.	✔	5	5	2	✘
7NEF-CA-4	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.GLY.ZDC.	✔	5	6	2	✘
7NEF-CA-5	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.GLY.ZDC.	✔	5	6	2	✘
7NEF-CA-6	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASP.GLU.ZDC.	✔	5	5	2	✘
7NEF-CA-7	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.GLY.ZDC.	✔	5	6	2	✘
7NEF-CA-8	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASP.GLU.ZDC.	✔	5	5	2	✘
7NEW-CA-1	CA	Ca²⁺	D2G1N2X1	ASN.ASP.GLY.ZDC.	ASN.ASP.GLY.ZDC.	✘	6	6	3	✔
7NEW-CA-2	CA	Ca²⁺	D3E1X1	ASP.GLU.ZDC.	ASP.GLU.ZDC.	✘	5	5	2	✔
7NEW-CA-3	CA	Ca²⁺	D3E1X1	ASP.GLU.ZDC.	ASP.GLU.ZDC.	✘	5	5	2	✘
7NEW-CA-4	CA	Ca²⁺	D2G1N2X1	ASN.ASP.GLY.ZDC.	ASN.ASP.GLY.ZDC.	✘	6	6	3	✘