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
1VAK-CA-60	CA	Ca²⁺	D2N2Y1	ASN.ASP.TYR.	ASN.ASP.TYR.	✔	5	5	2	✘
1UL3-CA-1	CA	Ca²⁺	D2E2F2	ASP.GLU.PHE.	ASP.GLU.PHE.	✔	6	6	2	✔
1UL3-CA-2	CA	Ca²⁺	D2E2F2	ASP.GLU.PHE.	ASP.GLU.PHE.	✔	6	6	2	✘
1NSD-CA-1	CA	Ca²⁺	E4	GLU.	GLU.HOH.	✔	4	5	4	✘
1NSC-CA-1	CA	Ca²⁺	E4	GLU.	GLU.HOH.	✔	4	5	4	✔
1NSB-CA-1	CA	Ca²⁺	E4	GLU.	GLU.HOH.	✔	4	5	4	✘
1OFL-CA-1	CA	Ca²⁺	E2N1X1	ASN.GCD.GLU.	ASN.GCD.GLU.HOH.	✘	4	6	2	✔
1H2G-CA-1	CA	Ca²⁺	D3E1P1V1	ASP.GLU.PRO.VAL.	ASP.GLU.PRO.VAL.	✘	6	6	2	✘
1GUN-CA-1	CA	Ca²⁺	D3	ASP.	ASP.HOH.	✔	3	9	3	✘
1GUN-CA-2	CA	Ca²⁺	D3	ASP.	ASP.HOH.	✔	3	9	3	✘
1GXO-CA-1	CA	Ca²⁺	D1X2	ADA.ASP.	ADA.ASP.HOH.	✘	3	6	2	✔
1GZT-CA-1	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.FUC.GLY.	✔	5	6	2	✘
1GZT-CA-2	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.FUC.GLY.	✔	5	6	2	✘
1GZT-CA-3	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.FUC.GLY.	✔	5	6	2	✘
1GZT-CA-4	CA	Ca²⁺	D2G1N2	ASN.ASP.GLY.	ASN.ASP.FUC.GLY.	✔	5	6	2	✘
1HEI-CA-1	CA	Ca²⁺	D1E1	ASP.GLU.	ASP.GLU.	✔	2	2	2	✔
1HM9-CA-1	CA	Ca²⁺	N3	ASN.	ASN.HOH.	✔	3	6	3	✔
1K5Q-CA-1	CA	Ca²⁺	D3E1P1V1	ASP.GLU.PRO.VAL.	ASP.GLU.PRO.VAL.	✘	6	6	2	✘
1K5S-CA-1	CA	Ca²⁺	D3E1P1V1	ASP.GLU.PRO.VAL.	ASP.GLU.PRO.VAL.	✘	6	6	2	✘
1K6S-CA-1	CA	Ca²⁺	E2	GLU.	GLU.HOH.	✔	2	3	2	✘