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
3ARA-MG-1	MG	Mg²⁺	E3	GLU.	GLU.HOH.	✔	3	4	3	✔
3ARN-MG-1	MG	Mg²⁺	D3	ASP.	ASP.HOH.	✔	3	8	3	✔
3ARN-MG-2	MG	Mg²⁺	E3	GLU.	GLU.HOH.	✔	3	4	3	✔
3B4U-MG-1	MG	Mg²⁺	D2	ASP.	ASP.HOH.	✔	2	5	2	✔
3AWD-MG-1	MG	Mg²⁺	W2	TRP.	HOH.TRP.	✔	2	6	2	✔
3AWD-MG-2	MG	Mg²⁺	W2	TRP.	HOH.TRP.	✔	2	6	2	✘
3VYT-MG-1	MG	Mg²⁺	D2	ASP.	ASP.HOH.	✔	2	3	2	✔
3VYT-MG-2	MG	Mg²⁺	D2	ASP.	ASP.HOH.	✔	2	3	2	✘
3WBH-MG-1	MG	Mg²⁺	A1G1K1S2	ALA.GLY.LYS.SER.	ALA.GLY.HOH.LYS.SER.	✔	5	6	2	✔
3WBH-MG-2	MG	Mg²⁺	A1G1K1S2	ALA.GLY.LYS.SER.	ALA.GLY.HOH.LYS.SER.	✔	5	6	2	✘
3WJP-MG-1	MG	Mg²⁺	D2	ASP.	ANP.ASP.HOH.	✔	2	4	2	✔
3WJP-MG-2	MG	Mg²⁺	D2	ASP.	ANP.ASP.HOH.	✔	2	4	2	✘
3WJQ-MG-1	MG	Mg²⁺	D2	ASP.	ASP.ATP.HOH.	✔	2	4	2	✘
3WJQ-MG-2	MG	Mg²⁺	D2	ASP.	ASP.ATP.HOH.	✔	2	4	2	✘
3WNW-MG-1	MG	Mg²⁺	D1E1	ASP.GLU.	HOH.	✔	2	6	2	✘
3WNW-MG-2	MG	Mg²⁺	D1E1	ASP.GLU.	HOH.	✔	2	6	2	✘
3WNW-MG-3	MG	Mg²⁺	D2E1	ASP.GLU.	ASP.GLU.HOH.	✔	3	7	2	✘
3WNW-MG-4	MG	Mg²⁺	D2E1	ASP.GLU.	ASP.GLU.HOH.	✔	3	7	2	✘
3WNW-MG-5	MG	Mg²⁺	D1E1	ASP.GLU.	HOH.	✔	2	7	2	✘
3WNW-MG-6	MG	Mg²⁺	D1E1	ASP.GLU.	HOH.	✔	2	7	2	✘