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
3MMZ-CA-4	CA	Ca²⁺	A2G2	ALA.GLY.	ALA.GLY.HOH.	✔	4	7	2	✘
3MQ6-CA-1	CA	Ca²⁺	C1D1F1	ASP.DC.PHE.	ASP.DC.HOH.PHE.	✘	3	6	2	✘
3MQ6-CA-2	CA	Ca²⁺	C1D1F1	ASP.DC.PHE.	ASP.DC.HOH.PHE.	✘	3	6	2	✘
3M6Y-CA-1	CA	Ca²⁺	A1E1	ALA.GLU.	ALA.GLU.HOH.	✔	2	5	2	✔
3M6Y-CA-2	CA	Ca²⁺	A2	ALA.	ASN.HOH.	✔	2	7	2	✔
3M9O-CA-1	CA	Ca²⁺	C1D1E1	ASP.DC.GLU.	ALA.HOH.ILE.	✘	3	6	2	✔
3M9N-CA-1	CA	Ca²⁺	C1D1E1	ASP.DC.GLU.	ASP.DC.GLU.HOH.	✘	3	6	2	✔
3LYE-CA-1	CA	Ca²⁺	D1E1N1T1	ASN.ASP.GLU.THR.	ASN.ASP.GLU.HOH.THR.	✔	4	6	2	✔
3LYE-CA-2	CA	Ca²⁺	D1E1N1T1	ASN.ASP.GLU.THR.	ASN.ASP.GLU.HOH.THR.	✔	4	6	2	✘
3LYE-CA-3	CA	Ca²⁺	D1E1N1T1	ASN.ASP.GLU.THR.	ASN.ASP.GLU.HOH.THR.	✔	4	6	2	✘
3LYE-CA-4	CA	Ca²⁺	D1E1N1T1	ASN.ASP.GLU.THR.	ASN.ASP.GLU.HOH.THR.	✔	4	6	2	✘
3SQG-CA-1	CA	Ca²⁺	A2R2T2	ALA.ARG.THR.	ALA.ARG.THR.	✔	6	6	2	✔
3SPZ-CA-1	CA	Ca²⁺	C1D1	ASP.DC.	ASP.DC.UPC.	✘	2	3	2	✔
3T5L-CA-1	CA	Ca²⁺	C1D1E1	ASP.DC.GLU.	ASP.DC.GLU.HOH.	✘	3	5	2	✔
3SVL-CA-1	CA	Ca²⁺	D2L1	ASP.LEU.	ASP.HOH.LEU.	✔	3	6	2	✔
3SVL-CA-2	CA	Ca²⁺	D2L1	ASP.LEU.	ASP.HOH.LEU.	✔	3	6	2	✘
3VKZ-CA-1	CA	Ca²⁺	D3	ASP.	ASP.HOH.IPM.	✔	3	6	2	✘
3VKZ-CA-2	CA	Ca²⁺	D3	ASP.	ASP.HOH.IPM.	✔	3	6	2	✘
3VL2-CA-1	CA	Ca²⁺	D3	ASP.	ASP.HOH.IPM.	✔	3	6	2	✘
3VL2-CA-2	CA	Ca²⁺	D3	ASP.	ASP.HOH.IPM.	✔	3	6	2	✘