GO:0005261	F	1.00	cation channel activity
GO:1901363	F	0.33	heterocyclic compound binding
GO:0097159	F	0.33	organic cyclic compound binding
GO:0035639	F	0.23	purine ribonucleoside triphosphate binding
GO:0032555	F	0.23	purine ribonucleotide binding
GO:0032550	F	0.23	purine ribonucleoside binding
GO:0003824	F	0.14	catalytic activity
GO:0005525	F	0.13	GTP binding
GO:0046872	F	0.11	metal ion binding
