19
Alignment of A/Hong Kong/156/97 and
A/Vietnam/1203/04 H5 Hemagglutinins
HA cleavage efficiency
Absent
Absent
325Rķ
Antigenic site E
266
T
A
A
T263
Receptor binding
227
(4)
N223§
S223
Antigenic site D
216
R
K
K
E212
Adjacent to receptor binding, antigenic site B
193
K
R
R
K189
Near L190; receptor binding?
192
T (3)
T
T
T188
Near H179; receptor binding?
179
L (2)
L
L
L175
N154 glycosylation motif
160
T
A
A
T156
Antigenic site B
159
N155
S155
Antigenic site A
142
Q
Q
Q
L138
Receptor binding
133a
L
L
S
S129
Antigenic site B
129
S
S
D
N124
Near Y91; receptor binding?
101
D (1)
D
D
N94
Antigenic site E
93
V
A
A
A86
Antigenic site E
92
N
N
N
S84
Antigenic site C
54
D
D
D
N45*
Functional significance
H3 No.
Clade 1
Clade 1ī
Clade 2
Clade 3
EID 11:1515-1521, 2005