Recombinant Influenza B virus (strain B/Singapore/222/1979) nucleoprotein, UniProt accession P04666.
Encapsidates the negative strand viral RNA, protecting it from nucleases. The encapsidated genomic RNA is termed the ribonucleoprotein (RNP) and serves as template for transcription and replication. The RNP needs to be localized in the nucleus to start a