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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Curr Opin Virol. 2016 Feb 27;17:95–103. doi: 10.1016/j.coviro.2016.02.002

Figure 1. Schematic of the trimeric influenza virus HA.

Figure 1

The membrane distal globular head domain is shown in red and the membrane proximal stalk domain is shown in blue. Cysteines 52 and 277 - which form a disulfide bond that demarcates head and stalk domain - are shown in yellow. The schematic is based on the H1 HA of A/PR/8/34 (PDB 1RU7 as described in [92]).