>sp|P0C5U9|PB1F2_I01A3 Protein PB1-F2 OS=Influenza A virus GN=PB1 MEQEQDTPWTQSTEHINIQKRGNGQRTQRPEHPNSIRLMDHCLRIMSRVGMHRQIVYWKQ WLSLKSPTQGSLKTRVLKRWKLFSKQEWIN