>sp|A4GBY6|PB1F2_I77AA Protein PB1-F2 OS=Influenza A virus (strain A/Brazil/11/1978 H1N1) OX=393560 GN=PB1 PE=3 SV=1 MGQEQGTPWIQSTGHISTQKGEDGQKTPKLEHRNSTRLMGHYQKTMNQVVMPKQIVY