GU052234   Influenza A virus (A/blackhead gull/Astrakhan/1421/1979(H13N6)) segment 7 matrix protein 2 (M2) and matrix protein 1 (M1) genes, complete cds.   [Influenza A virus (A/blackhead gull/Astrakhan/1421/1979(H13N6)) | 680696.5]