Anti-Influenza A virus PA/Polymerase Acidic Protein Polyclonal Antibody|抗甲型流感病毒PA/聚合酶酸性蛋白多克隆抗体(靶标：甲型流感病毒聚合酶酸性蛋白)

Polymerase acidic protein (PA) is a ~82 kDa protein. Plays an essential role in viral RNA transcription and replication by forming the heterotrimeric polymerase complex together with PB1 and PB2 subunits. The complex transcribes viral mRNAs by using a unique mechanism called cap-snatching. It consists in the hijacking and cleavage of host capped pre-mRNAs. These short capped RNAs are then used as primers for viral mRNAs. The PB2 subunit is responsible for the binding of the 5' cap of cellular pre-mRNAs which are subsequently cleaved after 10-13 nucleotides by the PA subunit that carries the endonuclease activity.