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
2BOI-CA-4	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.GLY.MFU.	✔	5	6	2	✘
2C2R-CA-1	CA	Ca²⁺	D2E1X1	ASP.DOC.GLU.	ASP.DOC.GLU.	✘	4	4	2	✔
2BV4-CA-1	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.GLY.MMA.	✔	5	6	2	✘
2BV4-CA-2	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.GLY.MMA.	✔	5	6	2	✘
2BV4-CA-3	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.GLY.MMA.	✔	5	6	2	✘
2BV4-CA-4	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.GLY.MMA.	✔	5	6	2	✘
2CHH-CA-1	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.BMA.GLY.MAN.	✔	5	7	2	✘
2CHH-CA-2	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.BMA.GLY.	✔	5	6	2	✘
2CHH-CA-3	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.GLY.MAN.	✔	5	6	2	✘
2CHH-CA-4	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.GLY.MAN.	✔	5	6	2	✘
1LOM-CA-1	CA	Ca²⁺	S2	SER.	HOH.SER.	✔	2	3	2	✔
1LOM-CA-2	CA	Ca²⁺	S2	SER.	HOH.SER.	✔	2	3	2	✘
1M1N-CA-1	CA	Ca²⁺	D2E1R1	ARG.ASP.GLU.	ARG.ASP.GLU.HOH.	✔	4	7	2	✔
1M1N-CA-2	CA	Ca²⁺	D2E1R1	ARG.ASP.GLU.	ARG.ASP.GLU.HOH.	✔	4	7	2	✘
1M1Y-CA-1	CA	Ca²⁺	D2E1R1	ARG.ASP.GLU.	ARG.ASP.GLU.	✔	4	4	2	✘
1M1Y-CA-2	CA	Ca²⁺	D2E1R1	ARG.ASP.GLU.	ARG.ASP.GLU.	✔	4	4	2	✘
1LQV-CA-1	CA	Ca²⁺	E1X3	CGU.GLU.	CGU.GLU.HOH.	✘	4	5	2	✔
1LQV-CA-2	CA	Ca²⁺	E1X2	CGU.GLU.	CGU.GLU.HOH.	✘	3	4	2	✔
1M5X-CA-1	CA	Ca²⁺	D2G2	ASP.DG.	ASP.DG.	✘	4	4	4	✔
1M5X-CA-2	CA	Ca²⁺	A1D1G2	ASP.DA.DG.GLY.	ASP.DA.DG.GLY.HOH.	✘	4	6	4	✔