>sp|A4GCM0-1|M2_I35A3 Isoform M2 of Matrix protein 2 OS=Influenza A virus (strain A/USA:Phila/1935 H1N1) OX=425570 GN=M MSLLTEVETPIRNEWGCRCNGSSDPLVIAASIIGILHLILWILDRLLFKCIYRRFKYGLK RGPSTEGVPESMREEYRKEQQSAVDADDGHFVNIEPE