| Abstract: | Tryptic mapping of radioactive methionine-labeled NP proteins of 15 species of human influenzae A viruses and 11 animal viruses was performed. On the basis of similarities and differences of peptide maps, NP proteins were divided into 4 groups designated A, B, C, and D. Group A included viruses A/WS/33 and A/PR/8/34; Group B viruses H1N1 (apart from those isolated after 1977 and WSN virus), H2N2, H3N2, and 8 species of animal influenza viruses, Group C 4 species of H1N1 viruses isolated in 1977-1979 (A/USSR/90/77, A/USSR/086/79, A/USSR/093/79, A/Brazil/79); Group D three species of animal influenza viruses (A/swine/Iowa/30, A/horse/Praha/56, A/duck/England/56). |
