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
5BIR-CA-2	CA	Ca²⁺	D1G1Y1	ASP.GLY.TYR.	ASP.GLY.HOH.TYR.	✔	3	5	2	✘
5BQT-CA-1	CA	Ca²⁺	E1L1N1	ASN.GLU.LEU.	ASN.GLU.LEU.	✔	3	3	2	✔
5K5S-CA-1	CA	Ca²⁺	D1E1G1	ASP.GLU.GLY.	ASP.GLU.GLY.HOH.	✔	3	4	2	✔
5K5S-CA-2	CA	Ca²⁺	D1E1G1	ASP.GLU.GLY.	ASP.GLU.GLY.	✔	3	3	2	✔
4OP5-CA-1	CA	Ca²⁺	E2	GLU.	GLU.HOH.	✔	2	6	2	✔
4OP8-CA-1	CA	Ca²⁺	E2	GLU.	GLU.HOH.	✔	2	6	2	✘
4P2P-CA-1	CA	Ca²⁺	E4S2	GLU.SER.	GLU.SER.	✔	6	6	2	✘
4OQH-CA-1	CA	Ca²⁺	E2	GLU.	GLU.HOH.	✔	2	6	2	✘
4OQI-CA-1	CA	Ca²⁺	E2	GLU.	GLU.HOH.	✔	2	6	2	✘
4OPZ-CA-1	CA	Ca²⁺	E2	GLU.	GLU.HOH.	✔	2	6	2	✘
4OUS-CA-1	CA	Ca²⁺	E3	GLU.	GLU.HOH.	✔	3	6	3	✔
6KDE-CA-1	CA	Ca²⁺	D2	ASP.	ASP.	✘	2	2	2	✘
6L84-CA-1	CA	Ca²⁺	C1D2E1	ASP.DC.GLU.	ASP.DC.GLU.HOH.	✘	4	6	2	✔
6KMW-CA-1	CA	Ca²⁺	A1D1V1	ALA.ASP.VAL.	ALA.ASP.HOH.VAL.	✔	3	7	2	✔
6KMW-CA-2	CA	Ca²⁺	A1D1V1	ALA.ASP.VAL.	ALA.ASP.HOH.VAL.	✔	3	7	2	✘
6KMW-CA-3	CA	Ca²⁺	A1D1V1	ALA.ASP.VAL.	ALA.ASP.HOH.VAL.	✔	3	7	2	✘
6KMX-CA-1	CA	Ca²⁺	E1P1V1	GLU.PRO.VAL.	GLU.HOH.PRO.VAL.	✔	3	5	2	✔
6KMX-CA-2	CA	Ca²⁺	E1P1V1	GLU.PRO.VAL.	GLU.HOH.PRO.VAL.	✔	3	5	2	✘
6KMX-CA-3	CA	Ca²⁺	E1P1V1	GLU.PRO.VAL.	GLU.HOH.PRO.VAL.	✔	3	5	2	✘
6BZ3-CA-1	CA	Ca²⁺	K2Q2S2	GLN.LYS.SER.	GLN.LYS.SER.	✔	6	6	2	✔