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
3NZG-MG-8	MG	Mg²⁺	A1S1	ALA.SER.	ALA.HOH.SER.	✔	2	6	2	✘
3P1O-MG-1	MG	Mg²⁺	E1K1Q1	GLN.GLU.LYS.	GLN.GLU.HOH.LYS.	✔	3	5	2	✘
3P1O-MG-2	MG	Mg²⁺	E1K1Q1	GLN.GLU.LYS.	GLN.GLU.HOH.LYS.	✔	3	5	2	✘
3OPK-MG-1	MG	Mg²⁺	A1P1Q1V1	ALA.GLN.PRO.VAL.	ALA.GLN.PRO.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	✘
3OYZ-K-1	K	K⁺	G1M1S2	GLY.MET.SER.	GLY.MET.SER.	✔	4	4	2	✔
3OYZ-K-2	K	K⁺	G1M1S2	GLY.MET.SER.	GLY.MET.SER.	✔	4	4	2	✘
3OYZ-K-3	K	K⁺	G1M1S2	GLY.MET.SER.	GLY.MET.SER.	✔	4	4	2	✘
3OYZ-K-4	K	K⁺	G1M1S2	GLY.MET.SER.	GLY.MET.SER.	✔	4	4	2	✘
3OYZ-K-5	K	K⁺	G1M1S2	GLY.MET.SER.	GLY.MET.SER.	✔	4	4	2	✘
3OYZ-K-6	K	K⁺	G1M1S2	GLY.MET.SER.	GLY.MET.SER.	✔	4	4	2	✘
3C9R-MG-1	MG	Mg²⁺	D1N1	ASN.ASP.	ASP.ATP.	✔	2	4	2	✘
3C9S-MG-1	MG	Mg²⁺	D1N1T1	ASN.ASP.THR.	ACP.ASP.HOH.THR.	✔	3	5	2	✘
3C9T-MG-1	MG	Mg²⁺	D1N1	ASN.ASP.	ACP.ASN.ASP.TPS.	✔	2	4	2	✘
3C9U-MG-1	MG	Mg²⁺	D1N1	ASN.ASP.	ADP.ASP.HOH.	✔	2	5	2	✔
3CVJ-MG-1	MG	Mg²⁺	E2	GLU.	GLU.	✔	2	2	2	✔
4D6O-MG-1	MG	Mg²⁺	A2C1D1	ALA.ASP.DA.DC.	ALA.ASP.DA.DC.HOH.	✘	4	6	3	✔