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  • Title: The site of 7-dehydrocholesterol ultraviolet photolysis in domestic fowls.
    Author: Uva B, Mandich A, Vallarino M.
    Journal: Acta Histochem; 1983; 73(2):175-80. PubMed ID: 6320573.
    Abstract:
    The site of the photolytic reaction leading to Vitamin D3 in fowls integument has been investigated by histochemical and biochemical analysis. The Vitamin D3 precursor, 7-dehydrocholesterol, is synthetized and stored mainly in the uropygial gland and in the same localization several amount of Vitamin D3 may be biochemically detected. 7-dehydrocholesterol and Vitamin D3 are also present although in a lesser amount in the unfeathered skin of the legs. Photolytic conversion of the Vitamin D3 precursor of uropygial origin may occur also on the dorsal feathers.
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