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
6FOH-MG-1	MG	Mg²⁺	K2N2	ASN.LYS.	ASN.HOH.LYS.	✔	4	6	2	✔
6FOG-MG-1	MG	Mg²⁺	K2N2	ASN.LYS.	ASN.HOH.LYS.	✔	4	6	2	✘
6G6R-K-1	K	K⁺	A1D1E1	ALA.ASP.GLU.	ALA.ASP.GLU.PPK.	✔	3	4	2	✔
6G6R-K-2	K	K⁺	A1D1E1	ALA.ASP.GLU.	ALA.ASP.GLU.PPK.	✔	3	4	2	✘
6G6R-K-3	K	K⁺	A1D1E1	ALA.ASP.GLU.	ALA.ASP.GLU.PPK.	✔	3	4	2	✘
6G6R-K-4	K	K⁺	A1D1E1	ALA.ASP.GLU.	ALA.ASP.GLU.PPK.	✔	3	4	2	✘
6G7F-MG-1	MG	Mg²⁺	A1D2S1	ALA.ASP.SER.	ALA.ASP.SER.	✘	4	4	2	✘
6G7F-MG-2	MG	Mg²⁺	D2I1W1	ASP.ILE.TRP.	ASP.ILE.TRP.	✘	4	4	2	✔
6G7F-MG-3	MG	Mg²⁺	A1D2	ALA.ASP.	ALA.ASP.	✘	3	3	2	✘
6HCN-MG-1	MG	Mg²⁺	Q3	GLN.	GLN.HOH.	✘	3	6	3	✔
6HEA-MG-1	MG	Mg²⁺	D1G1T1	ASP.GLY.THR.	ASP.ATP.GLY.THR.	✔	3	4	2	✔
2WIC-MG-1	MG	Mg²⁺	D3	ASP.	ASP.HOH.	✔	3	6	3	✔
2WLL-K-1	K	K⁺	G4Y4	GLY.TYR.	GLY.TYR.	✘	8	8	4	✔
2WLL-K-2	K	K⁺	G4V4	GLY.VAL.	GLY.VAL.	✘	8	8	4	✘
2EF0-NA-1	NA	Na⁺	H3	HIS.	HIS.	✔	3	3	3	✔
3N7X-CA-1	CA	Ca²⁺	E1Q1Y1	GLN.GLU.TYR.	GLN.GLU.HOH.TYR.	✔	3	6	2	✔
3N7X-CA-2	CA	Ca²⁺	E1Q1Y1	GLN.GLU.TYR.	GLN.GLU.HOH.TYR.	✔	3	6	2	✘
3N7X-CA-3	CA	Ca²⁺	E1Q1Y1	GLN.GLU.TYR.	GLN.GLU.HOH.TYR.	✔	3	6	2	✘
3N7X-CA-4	CA	Ca²⁺	E1Q1Y1	GLN.GLU.TYR.	GLN.GLU.HOH.TYR.	✔	3	6	2	✘
3N7X-CA-5	CA	Ca²⁺	E1Q1Y1	GLN.GLU.TYR.	GLN.GLU.HOH.TYR.	✔	3	6	2	✘