title: Formation of vitamin A in a freshwater fish. Isolation of retinoic acid.
abstract: The intestines of freshly caught Saccobranchus fossilis (a freshwater fish that contains dehydroretinol) became free from carotenoids and from vitamin A when the fish were starved for about 20 days. When beta-carotene was administered to such fish, retinoic acid could be isolated from the intestines after approx. 4h. When lutein was administered to such fish, dehydroretinol and 3-hydroxyretinol could be isolated from the intestines after approx. 5h.
mesh_terms: D000818:Animals; D002338:Carotenoids / Q000378:metabolism; D005399:Fishes / Q000378:metabolism*; D007413:Intestinal Mucosa / Q000378:metabolism; D014212:Tretinoin / Q000096:biosynthesis / Q000302:isolation & purification; D014801:Vitamin A / Q000096:biosynthesis*
chemical_list: D014801:Vitamin A; D002338:Carotenoids; D014212:Tretinoin