Table 2. An example of the ARI for host-restricted sites.

Host	Sequence	Site 1	Site 2
Avian	S1	P	P
	S2	Q	Q
	S3	Q	Q
	S4	Q	Q
	S5	Q	Q
	S6	Q	Q
Human	S7	C	P
	S8	C	P
	S9	C	P
	S10	L	Q
	S11	L	Q
ARI	–	0.58	0.13