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511-28-4C=C1CC[C@H](O)C/C1=C/C=C1\CCC[C@]2(C)[C@@H]([C@H](C)CC[C@H](C)C(C)C)CC[C@@H]12DIPPFEXMRDPFBK-JPWDPSJFSA-N511-28-4DTXSID801026994CHEBI:33237Pale Yellow Oil
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개요Derived from cholesterol, vitamin D is biosynthesized from its prohormone cholecalciferol (D3), the product of solar ultraviolet irradiation of 7-dehydrocholesterol in the skin. In 1966, it was first recognized that vitamin D must undergo activation via two oxidative metabolic steps. The first oxidation to 25-hydroxycholecalciferol (25(OH)D3: calcifediol; Calderol) occurs in the endoplasmic reticulum of the liver and is catalyzed by vitamin D 25-hydroxylase. This activation step is not regulated by plasma calcium concentrations. The major circulating form (10–80 μg/mL) is 25(OH)D3, which also is the primary storage form of vitamin D.
용도Vitamin D4 is the active analogue of Vitamin D.
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