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
1AQ8-CU-3	CU	Cu²⁺	H3	HIS.	HIS.	✔	3	3	2	✘
1ASO-CU-1	CU	Cu²⁺	H2	HIS.	HIS.	✔	2	2	2	✘
1ASO-CU-2	CU	Cu²⁺	H2	HIS.	HIS.	✔	2	2	2	✘
1ASP-CU-1	CU	Cu²⁺	H2	HIS.	HIS.	✔	2	2	2	✘
1ASP-CU-2	CU	Cu²⁺	H2	HIS.	HIS.	✔	2	2	2	✘
1ASQ-CU-1	CU	Cu²⁺	H2	HIS.	HIS.	✔	2	2	2	✘
1ASQ-CU-2	CU	Cu²⁺	H2	HIS.	HIS.	✔	2	2	2	✘
1AX4-K-1	K	K⁺	E1G1N1	ASN.GLU.GLY.	ASN.GLU.GLY.HOH.	✔	3	5	2	✘
1AX4-K-2	K	K⁺	E1G1N1	ASN.GLU.GLY.	ASN.GLU.GLY.HOH.	✔	3	6	2	✘
1AX4-K-3	K	K⁺	E1G1N1	ASN.GLU.GLY.	ASN.GLU.GLY.HOH.	✔	3	6	2	✘
1AX4-K-4	K	K⁺	E1G1N1	ASN.GLU.GLY.	ASN.GLU.GLY.HOH.	✔	3	5	2	✘
1AZ0-CA-1	CA	Ca²⁺	A1D2	ASP.DA.	ASP.DA.HOH.	✘	3	6	2	✔
1AZ0-CA-2	CA	Ca²⁺	A1D2	ASP.DA.	ASP.DA.HOH.	✘	3	5	2	✘
1B70-MG-1	MG	Mg²⁺	D1E2	ASP.GLU.	ASP.GLU.	✘	3	3	2	✔
1B70-MG-2	MG	Mg²⁺	D1E2	ASP.GLU.	ASP.GLU.	✘	3	3	2	✘
1B94-CA-1	CA	Ca²⁺	A1D2	ASP.DA.	ASP.DA.HOH.	✘	3	6	2	✔
1B94-CA-2	CA	Ca²⁺	A1D2	ASP.DA.	ASP.DA.HOH.	✘	3	8	2	✔
1BEX-CU-1	CU	Cu²⁺	A1D2	ALA.ASP.	ALA.ASP.HOH.	✔	3	4	2	✔
1BEX-CU-2	CU	Cu²⁺	A1D2	ALA.ASP.	ALA.ASP.HOH.	✔	3	4	2	✘
1BFV-ZN-1	ZN	Zn²⁺	D1E2	ASP.GLU.	ASP.GLU.HOH.	✘	3	4	2	✔