GO:0005057	F	0.39	receptor signaling protein activity
GO:0098809	F	0.22	nitrite reductase activity
GO:0016662	F	0.22	oxidoreductase activity, acting on other nitrogenous compounds as donors, cytochrome as acceptor
GO:0046914	F	0.16	transition metal ion binding
GO:0046906	F	0.16	tetrapyrrole binding
