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
2AOR-CA-2	CA	Ca²⁺	D1E1G1L1	ASP.DG.GLU.LEU.	ASP.DG.GLU.HOH.LEU.	✘	4	6	2	✔
2AOR-CA-3	CA	Ca²⁺	D1E1G1L1	ASP.DG.GLU.LEU.	ASP.DG.GLU.HOH.LEU.	✘	4	6	2	✘
2AOQ-CA-1	CA	Ca²⁺	D1E1G1T2	ASP.DG.DT.GLU.THR.	ASP.DG.DT.GLU.HOH.THR.	✘	5	7	2	✔
2AOQ-CA-2	CA	Ca²⁺	D1E1G1L1	ASP.DG.GLU.LEU.	ASP.DG.GLU.HOH.LEU.	✘	4	6	2	✔
2B0D-CA-1	CA	Ca²⁺	D2T1	ASP.DT.	ASP.DT.HOH.	✘	3	4	2	✔
2ASJ-CA-1	CA	Ca²⁺	D2E1X1	ASP.DDG.GLU.	HOH.	✘	4	2	2	✘
2ASD-CA-1	CA	Ca²⁺	D1E1X1	ASP.DDG.GLU.	HOH.	✘	3	6	2	✔
2ASL-CA-1	CA	Ca²⁺	D2X1	ASP.DOC.	HOH.	✘	3	6	2	✔
2ATL-CA-1	CA	Ca²⁺	D1E1X1	ASP.DDG.GLU.	ASP.DDG.GLU.HOH.	✘	3	5	2	✘
2AU0-CA-1	CA	Ca²⁺	D1E1X1	ASP.DDG.GLU.	ASP.DDG.GLU.HOH.	✘	3	5	2	✔
2AZZ-CA-1	CA	Ca²⁺	E4S2	GLU.SER.	GLU.SER.	✔	6	6	2	✘
2AZZ-CA-2	CA	Ca²⁺	K2	LYS.	LYS.	✔	2	2	2	✘
2AZY-CA-1	CA	Ca²⁺	E4S2	GLU.SER.	GLU.SER.	✔	6	6	2	✘
2BAM-CA-1	CA	Ca²⁺	D1E1F1G1	ASP.DG.GLU.PHE.	ASP.DG.GLU.HOH.PHE.	✘	4	6	2	✔
2BAM-CA-2	CA	Ca²⁺	D1E1G2	ASP.DG.GLU.	ASP.DG.GLU.HOH.	✘	4	6	2	✔
2BBV-CA-1	CA	Ca²⁺	D2G1	ASP.GLY.	ASP.GLY.	✔	3	3	2	✔
2BBV-CA-2	CA	Ca²⁺	D2G1	ASP.GLY.	ASP.GLY.	✔	3	3	2	✘
2BBV-CA-3	CA	Ca²⁺	D2G1	ASP.GLY.	ASP.GLY.	✔	3	3	2	✘
2BBV-CA-4	CA	Ca²⁺	D2G1	ASP.GLY.	ASP.GLY.	✔	3	3	2	✘
2BBV-CA-5	CA	Ca²⁺	D2G1	ASP.GLY.	ASP.GLY.	✔	3	3	2	✘