Extended Data Figure 5: Influenza receptor distribution on ferret soft palate.
From: The soft palate is an important site of adaptation for transmissible influenza viruses
Haematoxylin and eosin (H&E) staining of the soft palate from an uninfected ferret highlights the nasopharyngeal and oral surfaces. Scale bar, 1.25 mm. a, Areas highlighted in parts b–g are marked with dashed polygons: square, nasopharyngeal surface (b and e); circle, submucosal gland (c and f); and triangle, oral surface (d and g). b–d, H&E staining of these regions, reproduced from Fig. 4a–c, are shown. e–g, Staining with plant lectins specific for α2,6 sialic acid (SNA) and α2,3 sialic acid (MAL II) are shown. Scale bars are 100 μm in images b–g.
