From: A context-free encoding scheme of protein sequences for predicting antigenicity of diverse influenza A viruses
Subtype
Number of sequences
T
D/T
HA1 lengths
H1N1
68
355
0.50
327
H3N2
621
791
0.47
329
H5N1
148
293
0.57
320
H9N2
29
118
0.68
317
Combined
866
1557
0.52
340