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. 2015 Dec 8;5:17999. doi: 10.1038/srep17999

Table 1. Length polymorphisms of PB1-F2.

Influenza viruses Amino acids length of PB1-F2
HPAI H5N1 (A/turkey/England/50-92/91) 90
LPAI H2N3 90
LPAI H6N1 90
Pandemic H1N1 (2009) 11
USSR H1N1 57
Swine H1N1 52