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
6QMQ-NA-1	NA	Na⁺	D2X1	ACE.ASP.	ACE.ASP.	✘	3	3	2	✔
2NZM-CA-2	CA	Ca²⁺	D1N1X2	ADA.ASN.ASP.	ADA.ASN.ASP.HOH.	✘	4	6	2	✔
2O04-CA-1	CA	Ca²⁺	D1N1X2	ADA.ASN.ASP.	ADA.ASN.ASP.HOH.	✘	4	6	2	✔
2O1D-CA-2	CA	Ca²⁺	D1N1X2	ADA.ASN.ASP.	ADA.ASN.ASP.HOH.	✘	4	6	2	✔
2O0V-CA-2	CA	Ca²⁺	D1N1X2	ADA.ASN.ASP.	ADA.ASN.ASP.HOH.	✘	4	6	2	✔
2O17-CA-2	CA	Ca²⁺	D1N1X2	ADA.ASN.ASP.	ADA.ASN.ASP.HOH.	✘	4	6	2	✔
4YZX-CA-1	CA	Ca²⁺	E1N1Q1X1	ADA.ASN.GLN.GLU.	ADA.ASN.GLN.GLU.HOH.	✘	4	6	2	✔
2NZM-CA-1	CA	Ca²⁺	D3X1	ADA.ASP.	ADA.ASP.HOH.	✘	4	6	2	✔
2NZM-CA-3	CA	Ca²⁺	D1X2	ADA.ASP.	ADA.ASP.HOH.	✘	3	6	2	✔
2O04-CA-2	CA	Ca²⁺	D1X1	ADA.ASP.	ADA.ASP.HOH.	✘	2	5	2	✔
2O1D-CA-1	CA	Ca²⁺	D3X1	ADA.ASP.	ADA.ASP.HOH.	✘	4	6	2	✔
2O1D-CA-3	CA	Ca²⁺	D1X2	ADA.ASP.	ADA.ASP.HOH.	✘	3	6	2	✔
2O0V-CA-1	CA	Ca²⁺	D3X1	ADA.ASP.	ADA.ASP.HOH.	✘	4	6	2	✔
2O0V-CA-3	CA	Ca²⁺	D1X2	ADA.ASP.	ADA.ASP.HOH.	✘	3	6	2	✔
2O17-CA-1	CA	Ca²⁺	D3X1	ADA.ASP.	ADA.ASP.HOH.	✘	4	6	2	✔
2O17-CA-3	CA	Ca²⁺	D1X2	ADA.ASP.	ADA.ASP.HOH.	✘	3	6	2	✔
2EWE-CA-3	CA	Ca²⁺	D2X2	ADA.ASP.	ADA.ASP.HOH.	✘	4	6	2	✔
1GXO-CA-1	CA	Ca²⁺	D1X2	ADA.ASP.	ADA.ASP.HOH.	✘	3	6	2	✔
4YZQ-CA-1	CA	Ca²⁺	D1E1Q1X1	ADA.ASP.GLN.GLU.	ADA.ASP.GLN.GLU.HOH.	✘	4	8	2	✔
2EWE-CA-1	CA	Ca²⁺	D3E1X1	ADA.ASP.GLU.	ADA.ASP.GLU.HOH.	✘	5	6	2	✔