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
3QHQ-CA-6	CA	Ca²⁺	A1D1E2	ALA.ASP.GLU.	ALA.ASP.GLU.HOH.	✔	4	6	2	✘
3QLM-CA-1	CA	Ca²⁺	E4S2	GLU.SER.	GLU.SER.	✔	6	6	2	✘
3QA3-CA-1	CA	Ca²⁺	D2S2	ASP.SER.	ASP.HOH.SER.	✘	4	6	2	✔
2YA9-CA-1	CA	Ca²⁺	N2	ASN.	ASN.HOH.	✔	2	4	2	✘
2YAB-CA-1	CA	Ca²⁺	N2	ASN.	ASN.HOH.	✔	2	6	2	✔
2YAA-CA-1	CA	Ca²⁺	N2	ASN.	ASN.HOH.	✔	2	6	2	✘
3RAR-CA-1	CA	Ca²⁺	G2	GLY.	GLY.HOH.	✔	2	3	2	✔
3RAR-CA-2	CA	Ca²⁺	G2	GLY.	GLY.HOH.	✔	2	3	2	✘
3RB0-CA-1	CA	Ca²⁺	G1I1	DG.ILE.	DGT.GLU.HOH.	✘	2	3	2	✔
3RBX-CA-1	CA	Ca²⁺	D1E2R1	ARG.ASP.GLU.	ARG.ASP.GLU.	✔	4	4	2	✔
3RBX-CA-2	CA	Ca²⁺	D1E1G1	ASP.GLU.GLY.	ASP.GLU.GLY.	✔	3	3	2	✔
3RBX-CA-3	CA	Ca²⁺	D1E1G1	ASP.GLU.GLY.	ASP.GLU.GLY.	✔	3	3	2	✘
3RBZ-CA-1	CA	Ca²⁺	D1E2	ASP.GLU.	ASP.GLU.	✔	3	3	2	✘
3RBZ-CA-2	CA	Ca²⁺	D1E2	ASP.GLU.	ASP.GLU.	✔	3	3	2	✘
3RBZ-CA-3	CA	Ca²⁺	D1E1G1	ASP.GLU.GLY.	ASP.GLU.GLY.	✔	3	3	2	✔
3RBZ-CA-4	CA	Ca²⁺	D1E1G1	ASP.GLU.GLY.	ASP.GLU.GLY.	✔	3	3	2	✘
3RBZ-CA-5	CA	Ca²⁺	D1E2R1	ARG.ASP.GLU.	ARG.ASP.GLU.	✔	4	4	2	✘
3RBZ-CA-6	CA	Ca²⁺	D1E2R1	ARG.ASP.GLU.	ARG.ASP.GLU.	✔	4	4	2	✘
3RBZ-CA-7	CA	Ca²⁺	D1E1	ASP.GLU.	ASP.GLU.	✔	2	2	2	✘
3RBZ-CA-8	CA	Ca²⁺	D1E1	ASP.GLU.	ASP.GLU.	✔	2	2	2	✘