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
1NC7-MG-2	MG	Mg²⁺	L4	LEU.	LEU.	✔	4	4	4	✔
1NC7-MG-3	MG	Mg²⁺	T4	THR.	HOH.	✔	4	2	4	✔
1Q5H-MG-1	MG	Mg²⁺	E3	GLU.	GLU.HOH.	✔	3	4	3	✔
1Q6Z-MG-1	MG	Mg²⁺	L2N2R2	ARG.ASN.LEU.	ARG.ASN.LEU.	✔	6	6	2	✔
1Q6Z-MG-2	MG	Mg²⁺	L2N2R2	ARG.ASN.LEU.	ARG.ASN.LEU.	✔	6	6	2	✘
1Q9W-MG-1	MG	Mg²⁺	E2	GLU.	GLU.HOH.	✔	2	6	2	✔
1PYS-MG-1	MG	Mg²⁺	E2	GLU.	GLU.HOH.	✘	2	3	2	✔
1PYS-MG-2	MG	Mg²⁺	E2	GLU.	GLU.HOH.	✘	2	3	2	✘
1QH8-MG-1	MG	Mg²⁺	D2E1K1	ASP.GLU.LYS.	HOH.	✔	4	6	2	✘
1QH8-MG-2	MG	Mg²⁺	D2E1K1	ASP.GLU.LYS.	ASP.GLU.HOH.LYS.	✔	4	6	2	✘
1QGU-MG-1	MG	Mg²⁺	D2E1K1	ASP.GLU.LYS.	HOH.	✔	4	6	2	✔
1QGU-MG-2	MG	Mg²⁺	D2E1K1	ASP.GLU.LYS.	ASP.GLU.HOH.LYS.	✔	4	6	2	✘
1QH1-MG-1	MG	Mg²⁺	D2E1K1	ASP.GLU.LYS.	HOH.	✔	4	6	2	✘
1QH1-MG-2	MG	Mg²⁺	D2E1K1	ASP.GLU.LYS.	ASP.GLU.HOH.LYS.	✔	4	6	2	✘
2HFK-MG-1	MG	Mg²⁺	D2	ASP.	ASP.HOH.	✔	2	4	2	✔
2H7X-MG-1	MG	Mg²⁺	D2	ASP.	ASP.HOH.	✔	2	4	2	✘
2H7Y-MG-1	MG	Mg²⁺	D2	ASP.	ASP.HOH.	✔	2	4	2	✘
2GWS-NA-1	NA	Na⁺	G3	DG.	HOH.	✘	3	6	2	✔
2GWS-NA-2	NA	Na⁺	A1G1I1S1	ALA.DG.ILE.SER.	DG.HOH.	✘	4	6	2	✔
1TZN-MG-1	MG	Mg²⁺	D1S1T1	ASP.SER.THR.	ASP.SER.THR.	✘	3	3	2	✔