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. 2017 Feb;23(2):220–231. doi: 10.3201/eid2302.161072

Table 1. Amino acids in hemagglutinins from 2,562 highly pathogenic influenza A(H5N1) viruses isolated during 1996−2015 (excluding clade 2.3.4.4 viruses).

Position and amino acid No. occurrences
18K 119
49N 301
57K 481
76K 16
76R 0
86R 5
98T 32
99L 57
118T 1
119L 0
123R 40
127P 329
128N 276
131T 49
133L 1,029
137A 545
144A 4
145S 1,873
160A 1,467
166I 160
173R 67
187N 117
193N 4
196K 183
199D 0
202V 75
222Q 2
227R 23
244H 316
267T 1,805
273M 10
277H 1
494K 0
500I 0