Figure 3.
Lectin binding of Sambucus nigra (SNA) for α2,6-linked SA receptors in the respiratory and intestinal tract of aquatic and terrestrial bird species. Respiratory tract: a – northern pintail (nasal turbinates), b – ring-billed gull (trachea), c – European starling (nasal turbinates). Intestinal tract: d – wood duck (ileum), e – laughing gull (small intestine), f – budgerigar (small intestine). Arrows: 1 – ciliated cells; 2 – goblet cells; 3 – mucous glands; 4 – enterocytes; 5 – crypts. Bar: 50 µm.