Table 2.

Parsimony-informative sites of NA extracted by alignment of nucleotide sequences of all influenza virus clones determined by this study

Case	Regiona and/ or clone number	Position number of parsimony-informative site and assigned amino acid of clone 33
		29	53	80a	82a	94	142	212	218	221	225	237	275a	307
		I	V	V	S	V	D	I	S	N	R	S	H	N
1	R1–R2			M	P								Y
	R3			M	P	A							Y
	R4–R5			M	P								Y
	R6			M	P								Y	D
	R7			M	P					D			Y
	R8		A	M	P								Y
	R9–R11			M	P								Y
	R12	R		M	P								Y
	L1
	L2			M	P
	L3			M	P
	L4		A											S
	L5										G			S
	L6
	L7												Y
	L8–L10
	L11–L20			M	P								Y
	L21			M	P							F	Y
	L22			M	P								Y
	N1–N8			M	P								Y
	N9			M	P				G				Y
	N10–N11			M	P								Y
2	1–3								G
	4											F
	5–6
	7						G
	8–9
	10						G	M
	11
3	12					A
	13–14
	15										K
	16–21
4	22	R						M
	23		I
	24							M		D
	25–26							M
	27			A				M
	28							M
	29							M		D
	30–31							M
	32–37
	38										K
	39–42

^aKey mutations are designated with bold font