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
3G4T-MG-2	MG	Mg²⁺	E1G1	DG.GLU.	DG.GLU.PO4.	✘	2	3	2	✔
3GXY-MG-1	MG	Mg²⁺	Q2S2	GLN.SER.	GLN.HOH.SER.	✔	4	6	2	✔
3GXZ-MG-1	MG	Mg²⁺	Q2S2	GLN.SER.	GLN.HOH.SER.	✔	4	6	2	✔
3H9F-MG-1	MG	Mg²⁺	X2	TPO.	TPO.	✔	2	2	2	✔
3H9F-MG-2	MG	Mg²⁺	X2	TPO.	TPO.	✔	2	2	2	✘
3H9F-MG-3	MG	Mg²⁺	X2	TPO.	TPO.	✔	2	2	2	✘
3H9F-MG-4	MG	Mg²⁺	X2	TPO.	TPO.	✔	2	2	2	✘
3HXM-MG-1	MG	Mg²⁺	A1T1V1	DA.DT.VAL.	DA.DT.VAL.	✘	3	3	2	✘
3HK2-MG-1	MG	Mg²⁺	A1T1V1	DA.DT.VAL.	ASN.ASP.C.U.	✘	3	4	2	✘
3HJF-MG-1	MG	Mg²⁺	A1T1V1	DA.DT.VAL.	DA.DT.VAL.	✘	3	3	2	✘
3HM9-MG-1	MG	Mg²⁺	A1T1V1	DA.DT.VAL.	DA.DT.VAL.	✘	3	3	2	✘
3HO1-MG-1	MG	Mg²⁺	A1T1V1	DA.DT.VAL.	DA.DT.VAL.	✘	3	3	2	✘
3HRZ-MG-1	MG	Mg²⁺	S2T2	SER.THR.	HOH.SER.THR.	✘	4	6	2	✔
3HS0-MG-1	MG	Mg²⁺	S2T2	SER.THR.	HOH.SER.THR.	✘	4	6	2	✘
3HS0-MG-2	MG	Mg²⁺	S2T2	SER.THR.	HOH.SER.THR.	✘	4	6	2	✘
3I3S-MG-1	MG	Mg²⁺	D2R2	ARG.ASP.	ARG.ASP.HOH.	✔	4	6	2	✔
3I3S-MG-2	MG	Mg²⁺	D2R2	ARG.ASP.	ARG.ASP.HOH.	✔	4	6	2	✘
3I3S-MG-3	MG	Mg²⁺	D2R2	ARG.ASP.	ARG.ASP.HOH.	✔	4	6	2	✘
3HVR-MG-1	MG	Mg²⁺	A1T1V1	DA.DT.VAL.	DA.DT.VAL.	✘	3	3	2	✘
3JAA-MG-1	MG	Mg²⁺	D2E1T1	ASP.DT.GLU.	ASP.DT.DZ4.GLU.HOH.	✘	4	6	2	✘