HQ244421   Influenza A virus (A/mallard/Czech Republic/12652/2007(H4N6)) segment 2 polymerase PB1 (PB1) and PB1-F2 protein (PB1-F2) genes, complete cds.   [Influenza A virus (A/mallard/Czech Republic/12652/2007(H4N6)) | 661298.5]