FIGURE 1. Receptor-binding activity of H5N1 viruses.
From the following article:
Shinya Yamada, Yasuo Suzuki, Takashi Suzuki, Mai Q. Le, Chairul A. Nidom, Yuko Sakai-Tagawa, Yukiko Muramoto, Mutsumi Ito, Maki Kiso, Taisuke Horimoto, Kyoko Shinya, Toshihiko Sawada, Makoto Kiso, Taiichi Usui, Takeomi Murata, Yipu Lin, Alan Hay, Lesley F. Haire, David J. Stevens, Rupert J. Russell, Steven J. Gamblin, John J. Skehel & Yoshihiro Kawaoka
Nature 444, 378-382(16 November 2006)
doi:10.1038/nature05264
Direct binding of viruses to sialylglycopolymers containing either 
2,3-linked (blue) or 2,6-linked (red) sialic acids was measured. a, Human isolate, Vietnam 2004. b, Virus isolated from duck. c–e, Human isolates with capacity to recognize both SA2,6Gal and SA2,3Gal. Data are the mean 
s.d. of triplicate experiments.
