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
6TWH-CA-2	CA	Ca²⁺	E2N1	ASN.GLU.	ASN.GLU.NAG.	✘	3	4	3	✘
6TXO-CA-1	CA	Ca²⁺	E2N1X1	ASN.GLU.NAG.	ASN.GLU.HOH.NAG.	✘	4	5	4	✔
6UKI-CA-1	CA	Ca²⁺	A1C1D1E1	ALA.ASP.DC.GLU.	ALA.ASP.DC.GLU.HOH.	✘	4	5	2	✔
6UKI-CA-2	CA	Ca²⁺	C1D1G1	ASP.DC.DG.	ASP.DC.DG.HOH.	✘	3	4	2	✔
6UKH-CA-1	CA	Ca²⁺	A1C1D1E1	ALA.ASP.DC.GLU.	ALA.ASP.DC.GLU.	✘	4	4	2	✘
6UKH-CA-2	CA	Ca²⁺	C1D1G1	ASP.DC.DG.	ASP.DC.DG.HOH.	✘	3	4	2	✔
6UTT-CA-1	CA	Ca²⁺	D3	ASP.	ASP.HOH.	✔	3	4	3	✘
6UTT-CA-2	CA	Ca²⁺	D3	ASP.	ASP.HOH.	✔	3	4	3	✘
6UW0-CA-1	CA	Ca²⁺	E1G1T2	DT.GLU.GLY.	DT.GLU.GLY.HOH.	✘	4	5	3	✔
6UW0-CA-2	CA	Ca²⁺	A1C1E1G1	ALA.DC.DG.GLU.	ALA.DC.DG.GLU.HOH.	✘	4	5	3	✔
6UWH-CA-1	CA	Ca²⁺	A2C1D1	ALA.ASP.DA.DC.	ALA.ASP.DA.DC.HOH.	✘	4	6	3	✘
6UWH-CA-2	CA	Ca²⁺	E1G2	DG.GLU.GLY.	DG.GLU.GLY.HOH.	✘	3	7	2	✘
6UWH-CA-3	CA	Ca²⁺	A1E1T2	DA.DT.GLU.THR.	DA.DT.GLU.HOH.THR.	✘	4	6	2	✘
6UWK-CA-1	CA	Ca²⁺	A2C1D1	ALA.ASP.DA.DC.	ALA.ASP.DA.DC.HOH.	✘	4	6	3	✔
6UWK-CA-2	CA	Ca²⁺	C1I1	DC.ILE.	DC.HOH.ILE.	✘	2	4	2	✔
6UWK-CA-3	CA	Ca²⁺	E1G2	DG.GLU.GLY.	DG.GLU.GLY.HOH.	✘	3	5	2	✘
6UWK-CA-4	CA	Ca²⁺	A1E1T1	DA.GLU.THR.	DA.GLU.HOH.THR.	✘	3	5	2	✔
6UWJ-CA-1	CA	Ca²⁺	A2C1D1	ALA.ASP.DA.DC.	ALA.ASP.DA.DC.HOH.	✘	4	6	3	✔
6UWJ-CA-2	CA	Ca²⁺	E1G2	DG.GLU.GLY.	DG.GLU.GLY.HOH.	✘	3	6	2	✔
6UWJ-CA-3	CA	Ca²⁺	A1E1T2	DA.DT.GLU.THR.	DA.DT.GLU.HOH.THR.	✘	4	6	2	✔