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
1L8D-HG-1	HG	Hg²⁺	C4	CYS.	CYS.	✔	4	4	2	✔
1FE4-HG-1	HG	Hg²⁺	C4	CYS.	CYS.	✔	4	4	2	✘
6FY7-HG-1	HG	Hg²⁺	C1T1	DC.DT.	DC.DT.	✔	2	2	2	✔
6FY7-HG-2	HG	Hg²⁺	C1T1	DC.DT.	DC.DT.	✔	2	2	2	✘
6IUE-HG-1	HG	Hg²⁺	T5	DT.	DT.	✔	5	5	2	✔
6IUE-HG-2	HG	Hg²⁺	T2	DT.	DT.	✔	2	2	2	✔
6IUE-HG-3	HG	Hg²⁺	G1T1	DG.DT.	DG.DT.HOH.	✔	2	3	2	✔
1M3W-HG-1	HG	Hg²⁺	H2	HIS.	HIS.	✔	2	2	2	✔
1M3W-HG-2	HG	Hg²⁺	H2	HIS.	HIS.	✔	2	2	2	✔
2HBN-TL-1	TL	Tl⁺	G8	DG.	DG.	✔	8	8	2	✘
2HBN-TL-2	TL	Tl⁺	G7	DG.	DG.	✔	7	7	2	✘
2HBN-TL-3	TL	Tl⁺	G5	DG.	DG.	✔	5	5	2	✘
2HBN-TL-4	TL	Tl⁺	G2T2	DG.DT.	DG.DT.	✔	4	4	2	✔
2HBN-TL-5	TL	Tl⁺	G1T2	DG.DT.	DG.DT.	✔	3	3	2	✘
5GPE-PB-1	PB	Pb²⁺	C3	CYS.	CYS.	✔	3	3	2	✔
5GPE-PB-2	PB	Pb²⁺	C3	CYS.	CYS.	✔	3	3	2	✘
2CH7-PB-1	PB	Pb²⁺	E2	GLU.	GLU.	✘	2	2	2	✔
4AFI-PR-1	PR	Pr³⁺	D4	ASP.	ASP.HOH.	✔	4	6	2	✔
5I2S-YB-1	YB	Yb³⁺	E3	GLU.	GLU.	✔	3	3	3	✔
2OU7-ZN-1	ZN	Zn²⁺	C2	CYS.	CYS.	✔	2	2	2	✔