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Protein homology model of influenza A virus haemagglutinin. Protein homology model of A/Puerto Rico/8/1934 (H1N1) (NCBI: ABO21709), based on the crystal structure of 1HA0 [156]. (A) Haemagglutinin trimer. (B) Haemagglutinin protomer. Protein homology model was generated with SWISS-MODEL [157,158,159], and visualized in Discovery Studio (Dassault Systemès BIOVIA).
