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Histological aspects of the primary duct of the Bothrops jararaca snake. (A,B) Primary duct stained with PAS and Alcian blue, respectively; (C,D) Primary duct and accessory gland from non-extracted (0-day group) snake stained with PAS and Alcian blue, respectively. Regarding the primary duct, notice a weak reactivity to PAS and a negative reactivity to Alcian blue, indicating the presence of neutral polysaccharides only in the secretory epithelium and inside the lumen (L).
