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
3C25-CA-2	CA	Ca²⁺	C1D1E1	ASP.DC.GLU.	ASP.DC.GLU.	✘	3	3	2	✔
3BS6-CA-1	CA	Ca²⁺	E3Y2	GLU.TYR.	GLU.HOH.TYR.	✔	5	7	2	✔
3BS6-CA-2	CA	Ca²⁺	E3Y2	GLU.TYR.	GLU.HOH.TYR.	✔	5	7	2	✘
3BS6-CA-3	CA	Ca²⁺	E3	GLU.	GLU.HOH.	✔	3	5	2	✔
3BS6-CA-4	CA	Ca²⁺	E3	GLU.	GLU.HOH.	✔	3	5	2	✘
3BS6-CA-5	CA	Ca²⁺	E2K1	GLU.LYS.	GLU.HOH.LYS.	✔	3	5	2	✔
3BS6-CA-6	CA	Ca²⁺	E2K1	GLU.LYS.	GLU.HOH.LYS.	✔	3	5	2	✘
3BS6-CA-7	CA	Ca²⁺	A1N1	ALA.ASN.	ALA.ASN.HOH.	✔	2	4	2	✘
3BS6-CA-8	CA	Ca²⁺	A1N1	ALA.ASN.	ALA.ASN.HOH.	✔	2	4	2	✘
3BS6-CA-9	CA	Ca²⁺	A1N1	ALA.ASN.	ALA.ASN.HOH.	✔	2	4	2	✘
3BS6-CA-10	CA	Ca²⁺	A1N1	ALA.ASN.	ALA.ASN.HOH.	✔	2	4	2	✔
3C9E-CA-1	CA	Ca²⁺	E2N2Q2	ASN.GLN.GLU.	ASN.GLN.GLU.	✔	6	6	2	✔
3C9I-CA-1	CA	Ca²⁺	N3Q3	ASN.GLN.	ASN.GLN.	✔	6	6	3	✔
3SM3-CA-1	CA	Ca²⁺	D1T1	ASP.THR.	HOH.	✔	2	2	2	✔
3SM3-CA-2	CA	Ca²⁺	D1T1	ASP.THR.	ASP.THR.	✔	2	2	2	✘
3RV5-CA-1	CA	Ca²⁺	D1E1	ASP.GLU.	ASP.GLU.	✔	2	2	2	✔
3RV5-CA-2	CA	Ca²⁺	D1E1	ASP.GLU.	ASP.GLU.	✔	2	2	2	✘
3S6J-CA-1	CA	Ca²⁺	G2	GLY.	GLY.HOH.	✔	2	6	2	✔
3S5U-CA-1	CA	Ca²⁺	D2E2	ASP.GLU.	ASP.GLU.	✔	4	4	2	✔
3S5U-CA-2	CA	Ca²⁺	A1D1E1G1	ALA.ASP.GLU.GLY.	ALA.ASP.GLU.GLY.HOH.	✔	4	6	2	✔