Table 3.

Character of rgWSN and rgStachyflin-resistant virus clones

Virus		EC50 (μM)	Amino acid position in HA2a
			37	51	85	107
rgWSN	Wild type	0.02	D	K	D	T
	rgR1	>6.50	N	-b	-	-
	rgR2	>6.50	-	R	-	-
	rgR3	>6.50	-	-	H	-
	rgR4	>6.50	-	-	-	I

^a H3 subtype numbering.

^b Dash (-) means the same amino acid as the wild type virus.