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
6BKX-CA-2	CA	Ca²⁺	D3	ASP.	ASP.HOH.ICT.	✔	3	6	2	✘
6BL1-CA-1	CA	Ca²⁺	D2	ASP.	ASP.HOH.ICT.	✔	2	5	2	✘
6BL1-CA-2	CA	Ca²⁺	D2	ASP.	ASP.HOH.ICT.	✔	2	5	2	✘
6BL2-CA-1	CA	Ca²⁺	D2	ASP.	ASP.HOH.ICT.	✔	2	5	2	✘
6BL2-CA-2	CA	Ca²⁺	D2	ASP.	ASP.HOH.ICT.	✔	2	5	2	✘
5DKW-CA-1	CA	Ca²⁺	A2I1S1	ALA.DA.ILE.SER.	ALA.DA.HOH.ILE.SER.	✘	4	5	2	✔
5E1Q-CA-1	CA	Ca²⁺	E3X2	BGC.GLA.GLU.	BGC.GLA.GLU.HOH.	✘	5	6	2	✔
5DQI-CA-1	CA	Ca²⁺	C1D2E1	ASP.DC.GLU.	ASP.DC.DCP.GLU.HOH.	✘	4	6	2	✔
5E5O-CA-1	CA	Ca²⁺	C1D1E1G1	ASP.DC.GLU.GLY.	ASP.DC.GLU.GLY.HOH.	✘	4	6	2	✔
5E5O-CA-2	CA	Ca²⁺	A1D1E1T2	ALA.ASP.DT.GLU.	ALA.ASP.DT.GLU.HOH.	✘	5	7	3	✔
5EAN-CA-1	CA	Ca²⁺	A1D1E1L1	ASP.DA.GLU.LEU.	ASP.DA.GLU.HOH.LEU.	✘	4	5	2	✔
5EAN-CA-2	CA	Ca²⁺	A1D1E1L1	ASP.DA.GLU.LEU.	ASP.DA.GLU.HOH.LEU.	✘	4	5	2	✘
4XYD-CA-1	CA	Ca²⁺	E1G1Y1	GLU.GLY.TYR.	GLU.GLY.HEM.TYR.	✘	3	5	2	✔
4YGO-CA-1	CA	Ca²⁺	E4	GLU.	GLU.	✔	4	4	2	✘
4YGO-CA-2	CA	Ca²⁺	E4	GLU.	GLU.	✔	4	4	2	✘
4YGO-CA-3	CA	Ca²⁺	E1N1P1	ASN.GLU.PRO.	ASN.GLU.HOH.PRO.	✔	3	4	2	✔
4YGO-CA-4	CA	Ca²⁺	E1N1P1	ASN.GLU.PRO.	ASN.GLU.HOH.PRO.	✔	3	4	2	✘
4YGO-CA-5	CA	Ca²⁺	E1N1P1	ASN.GLU.PRO.	ASN.GLU.HOH.PRO.	✔	3	4	2	✔
4YGO-CA-6	CA	Ca²⁺	E1N1P1	ASN.GLU.PRO.	ASN.GLU.HOH.PRO.	✔	3	4	2	✘
4YGO-CA-7	CA	Ca²⁺	E4	GLU.	GLU.	✔	4	4	2	✘