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
3KSB-MG-1	MG	Mg²⁺	D1E1G1	ASP.DG.GLU.	ASP.DG.GLU.	✘	3	3	2	✔
3KSB-MG-2	MG	Mg²⁺	A1D1E1	ASP.DA.GLU.	ASP.DA.GLU.	✘	3	3	2	✔
3KYL-MG-1	MG	Mg²⁺	D3G1	ASP.DG.	ASP.DG.	✘	4	4	2	✔
3LK9-MG-1	MG	Mg²⁺	C1D3	ASP.DC.	ASP.DC.HOH.TFF.	✘	4	6	2	✘
3GDX-MG-1	MG	Mg²⁺	C1D3	ASP.DC.	4BD.ASP.DC.HOH.	✘	4	6	2	✘
3G3C-MG-1	MG	Mg²⁺	E1G1	DG.GLU.	DG.GLU.PO4.	✘	2	3	2	✘
3G3C-MG-2	MG	Mg²⁺	A1E1	DA.GLU.	DA.GLU.PO4.	✘	2	3	2	✘
3GQC-MG-1	MG	Mg²⁺	A1E1Y1	DA.GLU.TYR.	DA.GLU.TYR.	✘	3	3	2	✔
3GQC-MG-2	MG	Mg²⁺	A1L1T1V1	DA.LEU.THR.VAL.	DA.LEU.THR.VAL.	✘	4	4	2	✔
3OS0-MG-1	MG	Mg²⁺	D2G1	ASP.DG.	ASP.DG.HOH.	✘	3	6	2	✔
3OS0-MG-2	MG	Mg²⁺	D2G1	ASP.DG.	ASP.DG.HOH.	✘	3	6	2	✘
3OS1-MG-1	MG	Mg²⁺	C1D1E1	ASP.DC.GLU.	ASP.DC.GLU.	✘	3	3	2	✔
3OS1-MG-2	MG	Mg²⁺	C1D1E1	ASP.DC.GLU.	ASP.DC.GLU.	✘	3	3	2	✘
4D6O-MG-1	MG	Mg²⁺	A2C1D1	ALA.ASP.DA.DC.	ALA.ASP.DA.DC.HOH.	✘	4	6	3	✔
4D6O-MG-2	MG	Mg²⁺	C1E1G2	DC.DG.GLU.GLY.	DC.DG.GLU.GLY.HOH.	✘	4	5	3	✔
4CW7-MG-1	MG	Mg²⁺	D2E2	ASP.GLU.	ASP.GLU.	✘	4	4	2	✔
4CHG-MG-1	MG	Mg²⁺	D1E1	ASP.GLU.	ASP.GLU.HOH.	✘	2	6	2	✔
4CHG-MG-2	MG	Mg²⁺	D1E1	ASP.GLU.	ASP.GLU.HOH.	✘	2	6	2	✘
4DL4-MG-1	MG	Mg²⁺	D2E1G1	ASP.DG.GLU.	0KX.ASP.DG.GLU.HOH.	✘	4	6	2	✔
4DL5-MG-1	MG	Mg²⁺	C1D2E1	ASP.DC.GLU.	0KX.ASP.DC.GLU.	✘	4	5	2	✘