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
1OUX-CA-3	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.GLY.HOH.	✔	5	7	2	✘
1OUX-CA-4	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.GLY.HOH.	✔	5	7	2	✘
1OXC-CA-1	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.FUL.GLY.	✔	5	6	2	✘
1OXC-CA-2	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.FUC.GLY.	✔	5	6	2	✘
1OXC-CA-3	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.FUC.GLY.	✔	5	6	2	✘
1OXC-CA-4	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.FUC.FUL.GLY.	✔	5	7	2	✘
1PG6-CA-1	CA	Ca²⁺	D1E1G1X1	ASP.GLU.GLY.MSE.	ASP.GLU.GLY.HOH.MSE.	✔	4	6	2	✔
1PG6-CA-2	CA	Ca²⁺	D1E1G1X1	ASP.GLU.GLY.MSE.	ASP.GLU.GLY.HOH.MSE.	✔	4	6	2	✘
1PG6-CA-3	CA	Ca²⁺	D1E1G1X1	ASP.GLU.GLY.MSE.	ASP.GLU.GLY.HOH.MSE.	✔	4	6	2	✘
1PK6-CA-1	CA	Ca²⁺	D1Q2Y1	ASP.GLN.TYR.	ASP.GLN.HOH.TYR.	✘	4	6	2	✘
1PNM-CA-1	CA	Ca²⁺	D3E1P1V1	ASP.GLU.PRO.VAL.	ASP.GLU.PRO.VAL.	✘	6	6	2	✘
1PNL-CA-1	CA	Ca²⁺	D3E1P1V1	ASP.GLU.PRO.VAL.	ASP.GLU.PRO.VAL.	✘	6	6	2	✘
1PNK-CA-1	CA	Ca²⁺	D3E1P1V1	ASP.GLU.PRO.VAL.	ASP.GLU.PRO.VAL.	✘	6	6	2	✔
2B04-CA-1	CA	Ca²⁺	E4S2	GLU.SER.	GLU.SER.	✔	6	6	2	✘
2B04-CA-2	CA	Ca²⁺	K2	LYS.	HOH.LYS.	✔	2	4	2	✔
2B03-CA-1	CA	Ca²⁺	E4S2	GLU.SER.	GLU.SER.	✔	6	6	2	✘
2B01-CA-1	CA	Ca²⁺	E4S2	GLU.SER.	GLU.SER.	✔	6	6	2	✘
2B01-CA-2	CA	Ca²⁺	K2	LYS.	HOH.LYS.	✔	2	4	2	✘
2B00-CA-1	CA	Ca²⁺	E4S2	GLU.SER.	GLU.SER.	✔	6	6	2	✔
2AOR-CA-1	CA	Ca²⁺	D1E1G1	ASP.DG.GLU.	ASP.DG.GLU.HOH.	✘	3	6	2	✔