>sp|A4GCM1-1|M1_I35A3 Isoform M1 of Matrix protein 1 OS=Influenza A virus (strain A/USA:Phila/1935 H1N1) OX=425570 GN=M MSLLTEVETYVLSIVPSGPLKAEIAQRLEDVFAGKNTDLEALMEWLKTRPILSPLTKGIL GFVFTLTVPSERGLQRRRFVQNALNGNGDPNNMDKAVKLYRKIKREITFHGAKEIALSYS AGALASCMGLIYNRMGAVTTEVAFGLVCATCEQIADSQHRSHRQMVTTTNPLIRHENRMV LASTTAKAMEQMAGSSERAAEAMEVASQARQMVQAMRTIGTHPSSSAGLKDDLLENLQAY QKRMGVQMQRFK