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
4PDM-RB-4	RB	Rb⁺	G4Y4	GLY.TYR.	GLY.TYR.	✔	8	8	4	✘
6BPG-RB-1	RB	Rb⁺	G1K1L1	GLY.LEU.LYS.	GLY.LEU.LYS.	✔	3	3	2	✔
6BPG-RB-2	RB	Rb⁺	G1K1L1	GLY.LEU.LYS.	GLY.LEU.LYS.	✔	3	3	2	✘
6BPG-RB-3	RB	Rb⁺	K1L1	LEU.LYS.	LEU.LYS.	✔	2	2	2	✘
6BPG-RB-4	RB	Rb⁺	K1L1	LEU.LYS.	LEU.LYS.	✔	2	2	2	✔
1JVM-RB-1	RB	Rb⁺	G4	GLY.	GLY.HOH.	✔	4	5	4	✔
1JVM-RB-2	RB	Rb⁺	G4	GLY.	GLY.HOH.	✔	4	5	4	✘
1JVM-RB-3	RB	Rb⁺	T2V2	THR.VAL.	HOH.THR.VAL.	✔	4	5	3	✔
1JVM-RB-4	RB	Rb⁺	T2V2	THR.VAL.	HOH.THR.VAL.	✔	4	5	3	✘
1JVM-RB-5	RB	Rb⁺	T3	THR.	THR.	✔	3	3	3	✔
1JVM-RB-6	RB	Rb⁺	T3	THR.	THR.	✔	3	3	3	✘
1U3E-MN-1	MN	Mn²⁺	C1D1G1N1	ASN.ASP.DC.DG.	ASN.ASP.DC.DG.HOH.	✘	4	6	3	✔
4IAK-SR-1	SR	Sr²⁺	D1X1	ASP.SEP.	ADP.ASP.HOH.SEP.	✘	2	7	2	✘
4IAY-SR-1	SR	Sr²⁺	D1X1	ASP.SEP.	ADP.ASP.HOH.SEP.	✘	2	7	2	✘
5GSK-HG-1	HG	Hg²⁺	T2	DT.	DT.HOH.	✔	2	3	2	✔
5GSK-HG-2	HG	Hg²⁺	T2	DT.	DT.HOH.	✔	2	3	2	✘
1G1J-SR-1	SR	Sr²⁺	E2Q4	GLN.GLU.	GLN.GLU.HOH.	✔	6	8	4	✘
1ZQF-CS-1	CS	Cs⁺	I1T2	DT.ILE.THR.	DT.ILE.THR.	✘	3	3	2	✔
3IJ4-CS-1	CS	Cs⁺	D3	ASP.	ASP.	✔	3	3	3	✔
3IJ4-CS-2	CS	Cs⁺	D3	ASP.	ASP.	✔	3	3	3	✔