>sp|B4URD8-1|M1_I06A0 Isoform M1 of Matrix protein 1 OS=Influenza A virus (strain A/Russia:St.Petersburg/8/2006 H1N1) OX=518998 GN=M MSLLTEVETYVLSIIPSGPLKAEIAQRLEDVFAGKNTDLEVLMEWLKTRPILSPLTKGIL GFVFTLTVPSERGLQRRRFVQNALNGNGDPNNMDKAVKLYRKLKREITFHGAKEISLSYS AGALASCMGLIYNRMGAVTTEVAFGLVCATCEQIADSQHRSHRQMVTTTNPLIRHENRMV LASTTAKAMEQMAGSSEQAAEAMEVASQARQMVQAMRTIGTHPSSSAGLKNDLLENLQAY QKRMGVQMQRFK