GO:0015368	F	1.00	calcium:cation antiporter activity
GO:0015077	F	1.00	monovalent inorganic cation transmembrane transporter activity
GO:0015081	F	0.99	sodium ion transmembrane transporter activity
GO:0046872	F	0.81	metal ion binding
GO:0005509	F	0.75	calcium ion binding
GO:0022821	F	0.72	potassium ion antiporter activity
GO:0008273	F	0.59	calcium, potassium:sodium antiporter activity
GO:0005262	F	0.59	calcium channel activity
GO:0031402	F	0.56	sodium ion binding
GO:0030955	F	0.56	potassium ion binding
GO:0005432	F	0.40	calcium:sodium antiporter activity
GO:0051139	F	0.29	metal ion:proton antiporter activity
GO:0005451	F	0.29	monovalent cation:proton antiporter activity
GO:0020037	F	0.22	heme binding
GO:0005506	F	0.22	iron ion binding
GO:0004129	F	0.22	cytochrome-c oxidase activity
