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
2GK2-NI-1	NI	Ni²⁺	H3	HIS.	HIS.	✔	3	3	3	✔
4JRZ-NI-1	NI	Ni²⁺	H6	HIS.	HIS.	✔	6	6	3	✘
2UUI-NI-1	NI	Ni²⁺	H6	HIS.	HIS.	✔	6	6	3	✘
5YTL-CU-1	CU	Cu²⁺	M3	MET.	MET.	✔	3	3	3	✘
8EA4-MG-1	MG	Mg²⁺	D2T1	ASP.DT.	ASP.DT.	✘	3	3	2	✘
8EA4-MG-2	MG	Mg²⁺	C1D2G1	ASP.DC.DG.	ASP.DC.DG.	✘	4	4	3	✔
8EA3-MG-1	MG	Mg²⁺	D2T1	ASP.DT.	ASP.DT.	✘	3	3	2	✔
8EA3-MG-2	MG	Mg²⁺	C1D2	ASP.DC.	ASP.DC.	✘	3	3	2	✔
7B6V-MG-1	MG	Mg²⁺	E1F1	GLU.PHE.	GLU.HOH.PHE.	✔	2	3	2	✘
7B6V-MG-2	MG	Mg²⁺	E1F1	GLU.PHE.	GLU.HOH.PHE.	✔	2	3	2	✘
7B6V-MG-3	MG	Mg²⁺	E1F1	GLU.PHE.	GLU.PHE.	✔	2	2	2	✘
7B6V-MG-4	MG	Mg²⁺	E1F1	GLU.PHE.	GLU.PHE.	✔	2	2	2	✘
7B6V-MG-5	MG	Mg²⁺	E2F1	GLU.PHE.	GLU.PHE.	✔	3	3	2	✘
7B6S-MG-1	MG	Mg²⁺	E2F1	GLU.PHE.	GLU.HOH.PHE.	✔	3	4	2	✘
7B6S-MG-2	MG	Mg²⁺	E2F1	GLU.PHE.	GLU.HOH.PHE.	✔	3	4	2	✘
7B6S-MG-3	MG	Mg²⁺	E2F1	GLU.PHE.	GLU.HOH.PHE.	✔	3	4	2	✘
7B6S-MG-4	MG	Mg²⁺	E1F1	GLU.PHE.	GLU.PHE.	✔	2	2	2	✘
7B6S-MG-5	MG	Mg²⁺	E1F1	GLU.PHE.	GLU.HOH.PHE.	✔	2	4	2	✘
8DEL-ZN-1	ZN	Zn²⁺	H6	HIS.	HIS.	✔	6	6	3	✘
8CSZ-MG-1	MG	Mg²⁺	C1D1E1	ASP.DC.GLU.	ASP.DC.GLU.	✘	3	3	2	✔