>sp|Q67207-1|M2_I61A1 Isoform M2 of Matrix protein 2 OS=Influenza A virus (strain A/Swine/Wisconsin/1/1961 H1N1) OX=383533 GN=M MSLLTEVETPTRSEWGCRCNDSSDPLVAAASIIGILHLILWILDRLFFKCIYRRFKYGLK RGPSTEGVPESMREEYRQKQQSAVDVDDGHFVNIELE