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
4OX5-ZN-1	ZN	Zn²⁺	H2	HIS.	GLU.HOH.	✔	2	2	2	✔
4R1L-K-1	K	K⁺	G2K2	GLY.LYS.	GLY.HOH.LYS.	✔	4	5	2	✘
4R1L-K-2	K	K⁺	G2K2	GLY.LYS.	GLY.LYS.	✔	4	4	2	✘
4R1L-K-3	K	K⁺	G2K2	GLY.LYS.	GLY.HOH.LYS.	✔	4	5	2	✘
4R1L-K-4	K	K⁺	G2K2	GLY.LYS.	GLY.HOH.LYS.	✔	4	5	2	✔
4R1M-NA-1	NA	Na⁺	G2K2R1	ARG.GLY.LYS.	ARG.GLY.LYS.	✔	5	5	2	✔
4R1M-NA-2	NA	Na⁺	G2K1	GLY.LYS.	GLY.HOH.LYS.	✔	3	5	2	✘
4QQR-ZN-1	ZN	Zn²⁺	E2	GLU.	GLU.	✔	2	2	2	✔
4R2Y-ZN-1	ZN	Zn²⁺	C3	CYS.	CYS.	✔	3	3	2	✔
4QVU-NA-1	NA	Na⁺	D1L1V1	ASP.LEU.VAL.	ASP.HOH.LEU.VAL.	✔	3	4	2	✔
4QVU-NA-2	NA	Na⁺	D1L1V1	ASP.LEU.VAL.	ASP.HOH.LEU.VAL.	✔	3	4	2	✔
4QVU-NA-3	NA	Na⁺	D1L1V1	ASP.LEU.VAL.	ASP.HOH.LEU.VAL.	✔	3	4	2	✘
4QVU-NA-4	NA	Na⁺	D1L1V1	ASP.LEU.VAL.	ASP.HOH.LEU.VAL.	✔	3	4	2	✘
4UCH-ZN-1	ZN	Zn²⁺	C4	CYS.	CYS.	✔	4	4	2	✘
4UEO-ZN-1	ZN	Zn²⁺	H2	HIS.	HIS.	✔	2	2	2	✔
4UEK-ZN-1	ZN	Zn²⁺	H2	HIS.	HIS.	✔	2	2	2	✔
4S2T-ZN-1	ZN	Zn²⁺	D2E1X1	01B.ASP.GLU.	01B.ASP.GLU.	✘	4	4	2	✔
4RVN-K-1	K	K⁺	G2K2	GLY.LYS.	GLY.LYS.	✔	4	4	2	✔
4RVN-K-2	K	K⁺	G2K2	GLY.LYS.	GLY.HOH.LYS.	✔	4	5	2	✔
4RVO-K-1	K	K⁺	G2K2	GLY.LYS.	GLY.LYS.	✔	4	4	2	✘