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
6DBJ-CA-1	CA	Ca²⁺	A1D2	ASP.DA.	ASP.DA.	✘	3	3	2	✔
6DBJ-CA-2	CA	Ca²⁺	D1G2	ASP.DG.GLY.	ASP.DG.GLY.	✘	3	3	2	✔
6DBJ-CA-3	CA	Ca²⁺	A1D2	ASP.DA.	ASP.DA.	✘	3	3	2	✘
6DBV-CA-1	CA	Ca²⁺	C1D1E1	ASP.DC.GLU.	ASP.DC.GLU.	✘	3	3	2	✘
6GNQ-ZN-1	ZN	Zn²⁺	H3	HIS.	HIS.	✔	3	3	3	✔
6GPZ-ZN-1	ZN	Zn²⁺	E1Q1	GLN.GLU.	GLN.GLU.	✔	2	2	2	✔
6FNN-ZN-1	ZN	Zn²⁺	D1G1	ASP.GLY.	ASP.GLY.	✘	2	2	2	✔
6G63-ZN-1	ZN	Zn²⁺	C4	CYS.	CYS.	✔	4	4	2	✘
6G63-ZN-2	ZN	Zn²⁺	C4	CYS.	CYS.	✔	4	4	2	✘
6G84-CA-1	CA	Ca²⁺	N2	ASN.	ASN.	✔	2	2	2	✔
6G84-CA-2	CA	Ca²⁺	N2	ASN.	ASN.	✔	2	2	2	✘
6H5U-ZN-1	ZN	Zn²⁺	H2	HIS.	HIS.	✔	2	2	2	✔
6H5U-ZN-2	ZN	Zn²⁺	H2	HIS.	HIS.	✔	2	2	2	✔
6H5K-ZN-1	ZN	Zn²⁺	H2	HIS.	HIS.	✔	2	2	2	✘
6H87-ZN-1	ZN	Zn²⁺	H2	HIS.	HIS.	✔	2	2	2	✔
6HFH-ZN-1	ZN	Zn²⁺	H2	HIS.	HIS.	✔	2	2	2	✔
6JNI-ZN-1	ZN	Zn²⁺	C3	CYS.	CYS.	✔	3	3	2	✔
6JNI-ZN-2	ZN	Zn²⁺	C3	CYS.	CYS.	✔	3	3	2	✔
6JNI-ZN-3	ZN	Zn²⁺	H3	HIS.	HIS.	✔	3	3	2	✔
6JQE-ZN-1	ZN	Zn²⁺	C2	CYS.	CYS.	✔	2	2	2	✔