Two mutations in the C-terminal domain of influenza virus RNA polymerase PB2 enhance transcription by enhancing cap-1 RNA binding activity
Keywords: HA, hemagglutinin; HPAIV, highly pathogenic avian influenza virus; M1, matrix protein 1; NA, neuraminidase; NEP, nuclear export protein; NP, nucleoprotein; NS1, non-structural protein 1; PAGE, polyacrylamide gel electrophoresis; PEI, polyethyleneimine; Rd