EU580551   Influenza A virus (A/Anas crecca/Astrakhan/646/1987(H4N3)) segment 7 matrix protein 2 (M2) and matrix protein 1 (M1) genes, partial cds.   [Influenza A virus (A/Anas crecca/Astrakhan/646/1987(H4N3)) | 538404.5]