. "FUNCTION Implicated in endonuclease cleavage of capped RNA primers. Displays an elongation factor activity in viral RNA synthesis. Dispensable for viral transcription, but not replication.SUBUNIT Influenza RNA polymerase is composed of three subunits: PB1, PB2 and PA.SIMILARITY Belongs to the influenza viruses PA family."^^ . . "PA"^^ . "UniProt:P03433 PA"^^ . .