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
4Q4W-CA-90	CA	Ca²⁺	E2	GLU.	ALA.HOH.LEU.LYS.	✔	2	6	2	✘
4Q4W-CA-91	CA	Ca²⁺	E2	GLU.	ALA.HOH.LEU.LYS.	✔	2	6	2	✘
4Q4W-CA-92	CA	Ca²⁺	E2	GLU.	ALA.HOH.LEU.LYS.	✔	2	6	2	✘
4PZL-CA-1	CA	Ca²⁺	N2	ASN.	ASN.HOH.	✔	2	6	2	✔
4QB6-CA-1	CA	Ca²⁺	E1F1N1X1	ASN.GCU.GLU.PHE.	ASN.GCU.GLU.HOH.PHE.	✘	4	6	2	✔
4RGP-CA-1	CA	Ca²⁺	D1E2	ASP.GLU.	ASP.GLU.HOH.	✔	3	6	2	✔
4RGP-CA-2	CA	Ca²⁺	E2	GLU.	GLU.HOH.	✔	2	5	2	✔
4RGP-CA-3	CA	Ca²⁺	D1E2	ASP.GLU.	ASP.GLU.HOH.	✔	3	6	2	✔
4RI8-CA-1	CA	Ca²⁺	D1E1G1V1	ASP.DG.GLU.VAL.	ASP.DG.GLU.VAL.	✘	4	4	2	✔
4Z1X-CA-1	CA	Ca²⁺	E1G1T2	DT.GLU.GLY.	DT.GLU.GLY.HOH.	✘	4	5	3	✔
4Z1Z-CA-1	CA	Ca²⁺	A1D1T2	ALA.ASP.DT.	ALA.ASP.DT.	✘	4	4	3	✔
4Z20-CA-1	CA	Ca²⁺	A1T1	ALA.DT.	ALA.DT.	✘	2	2	2	✔
4YQW-CA-1	CA	Ca²⁺	D2E1T1	ASP.DT.GLU.	ASP.DCP.DT.GLU.HOH.	✘	4	6	2	✔
4YR0-CA-1	CA	Ca²⁺	D2E1T1	ASP.DT.GLU.	ASP.DCP.DT.GLU.HOH.	✘	4	6	2	✔
4YR2-CA-1	CA	Ca²⁺	D2E1T1	ASP.DT.GLU.	ASP.DT.DTP.GLU.	✘	4	5	2	✔
4YR3-CA-1	CA	Ca²⁺	D2E1T1	ASP.DT.GLU.	ASP.DCP.DT.GLU.HOH.	✘	4	6	2	✔
4Z94-CA-1	CA	Ca²⁺	A1D1E1G1	ALA.ASP.GLU.GLY.	ALA.ASP.GLU.GLY.	✘	4	4	2	✔
4YZ0-CA-1	CA	Ca²⁺	E1Q1X2	ADA.GLN.GLU.	ADA.GLN.GLU.HOH.	✘	4	6	2	✔
4YZQ-CA-1	CA	Ca²⁺	D1E1Q1X1	ADA.ASP.GLN.GLU.	ADA.ASP.GLN.GLU.HOH.	✘	4	8	2	✔
4YZQ-CA-2	CA	Ca²⁺	E2X2	ADA.GLU.	ADA.GLU.HOH.	✘	4	6	2	✔