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
3FSY-MG-2	MG	Mg²⁺	E3	GLU.	GLU.HOH.	✔	3	9	3	✔
1GUT-MG-2	MG	Mg²⁺	D3	ASP.	ASP.HOH.	✔	3	9	3	✔
1GUS-MG-2	MG	Mg²⁺	D3	ASP.	ASP.HOH.	✔	3	9	3	✔
6FIZ-K-2	K	K⁺	T4V4	THR.VAL.	HOH.THR.VAL.	✔	8	9	4	✘
1GUN-CA-1	CA	Ca²⁺	D3	ASP.	ASP.HOH.	✔	3	9	3	✘
1GUN-CA-2	CA	Ca²⁺	D3	ASP.	ASP.HOH.	✔	3	9	3	✘
3ARN-MG-1	MG	Mg²⁺	D3	ASP.	ASP.HOH.	✔	3	8	3	✔
2WLL-K-1	K	K⁺	G4Y4	GLY.TYR.	GLY.TYR.	✘	8	8	4	✔
2WLL-K-2	K	K⁺	G4V4	GLY.VAL.	GLY.VAL.	✘	8	8	4	✘
1GUS-MG-1	MG	Mg²⁺	D3	ASP.	ASP.HOH.	✔	3	8	3	✘
4PDV-BA-1	BA	Ba²⁺	T4V4	THR.VAL.	THR.VAL.	✔	8	8	4	✘
3E8F-BA-1	BA	Ba²⁺	T4V4	THR.VAL.	THR.VAL.	✔	8	8	4	✘
3E8F-BA-2	BA	Ba²⁺	G4	GLY.	GLY.HOH.	✔	4	8	4	✘
3E8F-BA-3	BA	Ba²⁺	G4	GLY.	GLY.HOH.	✔	4	8	4	✘
6TZQ-BA-1	BA	Ba²⁺	G8	DG.	DG.	✔	8	8	4	✔
6TZR-BA-1	BA	Ba²⁺	G8	DG.	DG.	✔	8	8	4	✘
4ZBM-BA-1	BA	Ba²⁺	T4V4	THR.VAL.	THR.VAL.	✔	8	8	4	✘
7ECF-BA-1	BA	Ba²⁺	G8	DG.	DG.	✔	8	8	2	✔
7ECF-BA-2	BA	Ba²⁺	G8	DG.	DG.	✔	8	8	2	✘
7ECF-BA-3	BA	Ba²⁺	G8	DG.	DG.	✔	8	8	2	✘