GU052243   Influenza A virus (A/blackhead gull/Astrakhan/458/1985(H13N6)) segment 3 polymerase PA (PA) gene, complete cds.   [Influenza A virus (A/black-headed gull/Astrakhan/458/1985(H13N6)) A/blackhead gull/Astrakhan/458/1985 | 538414.4]