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
4RFU-CA-1	CA	Ca²⁺	D3V1	ASP.VAL.	ASP.HOH.VAL.	✔	4	6	2	✔
4RFU-CA-2	CA	Ca²⁺	D3V1	ASP.VAL.	ASP.HOH.VAL.	✔	4	7	2	✔
5J60-CA-1	CA	Ca²⁺	E2	GLU.	GLU.PG4.	✔	2	3	2	✔
5T2N-CA-1	CA	Ca²⁺	A1E1G1T1	DA.DT.GLU.GLY.	DA.DT.GLU.GLY.HOH.	✘	4	6	3	✘
5T2N-CA-2	CA	Ca²⁺	A1C1E1G1	ALA.DC.DG.GLU.	ALA.DC.DG.GLU.HOH.	✘	4	6	3	✔
5T2N-CA-3	CA	Ca²⁺	A1C1E2G1T1	DA.DC.DG.DT.GLU.	DA.DC.DG.DT.GLU.	✘	6	6	3	✔
5T2O-CA-1	CA	Ca²⁺	A1C1E1T1	ALA.DC.DT.GLU.	ALA.DC.DT.GLU.HOH.	✘	4	5	3	✔
5T2O-CA-2	CA	Ca²⁺	A1E1G1T1	DA.DT.GLU.GLY.	DA.DT.GLU.GLY.	✘	4	4	3	✔
5T2H-CA-1	CA	Ca²⁺	A2C1E1	ALA.DA.DC.GLU.	ALA.DA.DC.GLU.HOH.	✘	4	5	3	✔
5T2H-CA-2	CA	Ca²⁺	A1E1G1T1	DA.DT.GLU.GLY.	DA.DT.GLU.GLY.HOH.	✘	4	6	3	✔
5STD-CA-1	CA	Ca²⁺	D2E4	ASP.GLU.	ASP.GLU.	✔	6	6	2	✘
5STD-CA-2	CA	Ca²⁺	D2E4	ASP.GLU.	ASP.GLU.	✔	6	6	2	✘
5STD-CA-3	CA	Ca²⁺	D2E2	ASP.GLU.	ASP.GLU.	✔	4	4	2	✔
5STD-CA-4	CA	Ca²⁺	D2E2	ASP.GLU.	ASP.GLU.	✔	4	4	2	✘
5T8D-CA-1	CA	Ca²⁺	A1E1G1T1	DA.DT.GLU.GLY.	DA.DT.GLU.GLY.HOH.	✘	4	6	3	✔
5T8D-CA-2	CA	Ca²⁺	A2C1E1	ALA.DA.DC.GLU.	ALA.DA.DC.GLU.HOH.	✘	4	6	3	✔
5T8D-CA-3	CA	Ca²⁺	A2C1E2T1	DA.DC.DT.GLU.	DA.DC.DT.GLU.	✘	6	6	3	✔
5FIW-CA-1	CA	Ca²⁺	D2F1S1T1	ASP.PHE.SER.THR.	ASP.PHE.SER.THR.	✘	5	5	2	✔
3PCQ-CA-1	CA	Ca²⁺	D1F1P1	ASP.PHE.PRO.	ASP.HOH.PHE.PRO.	✔	3	7	2	✘
3PCQ-CA-2	CA	Ca²⁺	D1F1P1	ASP.PHE.PRO.	ASP.HOH.PHE.PRO.	✔	3	7	2	✘