Fig. 3.4b Secondary and tertiary structure of hemagglutinin

Fig. 3.4c Quaternary structure of hemagglutinin

Fig. 3.6 Alpha-helix

Fig. 3.7 Amphipathic region of five associated alpha-helices

Fig. 3.8 Beta-sheets

Fig. 3.9a Interactions of two amphipathic alpha-helix

Fig. 3.9b Prosthetic group (Calcium) associated with loop

Fig. 3.9c Zinc finger