Table 3. Amino acid differences of internal gene proteins between avian influenza H9N2 TS and V viruses.

Gene	Amino acid position	TS	V
PB2	60	N	D
	76	T	M
	109	V	I
	188	E	D
	292	I	V
	379	R	K
	555	R	K
	613	V	I
	627	E	K
	649	V	I
PB1	76	D	N
	111	M	I
	157	A	T
	171	T	M
	328	N	K
	368	V	I
	387	K	Q
	566	T	M
	621	Q	K
	744	T	M
PA	14	V	A
	142	R	K
	185	R	K
	254	N	T
	323	V	I
	552	T	N
	683	L	I
	684	G	E
NP	21	N	D
	52	H	Y
	214	R	K
	329	V	I
	417	S	N
	423	A	S
	473	S	N
	496	Y	H
	21	N	D
M2	10	P	H
	16	E	G
	27	V	I
	32	V	I
	85	N	D
NS1	26	G	E
	27	R	L
	59	H	R
	70	E	K
	86	A	V
	95	I	L
	123	I	T
	137	T	I
	179	E	G
	180	I	V
	197	T	N
NS2	11	G	D
	22	R	G
	40	L	I
	63	G	W
	85	H	R