TABLE 1.

Agglutination of erythrocytes by OH/04 aa 145 single mutant viruses

Amino acid at position 145	HA titer (HAU) with:
	0.5% turkey RBCs	0.5% chicken RBCs	1% horse RBCs
N (wt)	128	256	<2
A	128	64	<2
C	4	<2	<2
F	128	16	8
G	128	32	<2
H	256	128	<2
I	128	64	<2
K	128	128	<2
L	128	128	<2
M	128	128	<2
P	128	64	<2
Q	256	128	<2
R	128	64	<2
S	128	128	<2
T	128	64	<2
V	128	32	<2
Y	128	32	<2