>sp|A4K144-1|M2_I54A2 Isoform M2 of Matrix protein 2 OS=Influenza A virus (strain A/Malaysia:Malaya/302/1954 H1N1) OX=425566 GN=M MSLLTEVETPIRNEWGCRCNDSSDPLIIAASVVGILHLILWILDRLFFKCIYRLFKHGLK RGPSTEGVPESMREEYRKEQQSAVDADDSHFVNIELE