Vitamin D - Wikipedia
The structural difference between vitamin D 2 and vitamin D 3 lies in the side chain: vitamin D 2 has a double bond between carbons 22 and 23, and a methyl group on carbon 24. [3] Numerous vitamin D analogues have also been synthesized.
Cholecalciferol - Wikipedia
Cholecalciferol, also known as vitamin D 3 or colecalciferol, is a type of vitamin D that is produced by the skin when exposed to UVB light; it is found in certain foods and can be taken as a dietary supplement.
Vitamin D: Production, Metabolism and Mechanisms of Action
Dec 31, 2021 · The production of vitamin D3 from 7-dehydrocholesterol in the epidermis. Sunlight (the ultraviolet B component) breaks the B ring of the cholesterol structure to form pre- D3. Pre-D3 then undergoes a thermal induced rearrangement to form D3.
Cholecalciferol | C27H44O | CID 5280795 - PubChem
Both the endogenous form of vitamin D (that results from 7-dehydrocholesterol transformation), vitamin D3 (cholecalciferol), and the plant-derived form, vitamin D2 (ergocalciferol), are considered the main forms of vitamin d and are found in various types of food for daily intake.
Vitamin D Metabolism, Mechanism of Action, and Clinical …
Vitamin D 3 is made in the skin from 7-dehydrocholesterol under the influence of UV light. Vitamin D 2 (ergocalciferol) is derived from the plant sterol ergosterol. Vitamin D is metabolized first to 25 hydroxyvitamin D (25OHD), then to the hormonal form 1,25-dihydroxyvitamin D (1,25 (OH) 2 D).
Vitamin D – Structure, Functions, Synthesis, Mechanism, Deficiency
Apr 1, 2024 · DeepDive into Biochemistry. Podcast Free. Latest audio book. What is Vitamin D? Definition of Vitamin D. Properties of Vitamin D. Recommended Intakes of Vitamin D. Structure of Vitamin D. Types of Vitamin D. Absorption, transport and storage of Vitamin D. Biochemical functions of Vitamin D. Biosynthesis of Vitamin D.
Vitamin D: Metabolism, Molecular Mechanism of Action, and …
Dec 17, 2015 · 1,25-Dihydroxvitamin D 3 [1,25 (OH) 2 D 3] is the hormonally active form of vitamin D. The genomic mechanism of 1,25 (OH) 2 D 3 action involves the direct binding of the 1,25 (OH) 2 D 3 activated vitamin D receptor/retinoic X receptor (VDR/RXR) heterodimeric complex to specific DNA sequences.
The serum vitamin D metabolome: What we know and what is still …
The major circulating form of vitamin D is 25 (OH)D and both D2 and D3 forms are routinely measured by LC/MS/MS to assess vitamin D status, due to their relatively long half-lives and much higher concentrations compared to 1α,25 (OH) 2 D. Inactivation of both 25 (OH)D and 1α,25 (OH) 2 D is catalyzed by CYP24A1 and 25-hydroxyvitamin D3 3-epimerase.
Vitamin D Handbook : Structures, Synonyms, and Properties
Jul 16, 2007 · Vitamin D Handbook: Structures, Synonyms, and Properties. Editor (s): G. W. A. Milne, M. Delander. First published: 16 July 2007. Print ISBN: 9780470139837 | Online ISBN: 9780470238165 | DOI: 10.1002/9780470238165. Copyright © 2008 John Wiley & Sons, Inc. All rights reserved. About this book. A Comprehensive Reference On Vitamin D CHEMISTRY.
Cholecalciferol - NIST Chemistry WebBook
Cholecalciferol. Formula: C 27 H 44 O. Molecular weight: 384.6377. IUPAC Standard InChI: InChI=1S/C27H44O/c1-19 (2)8-6-9-21 (4)25-15-16-26-22 (10-7-17-27 (25,26)5)12-13-23-18-24 (28)14-11-20 (23)3/h12-13,19,21,24-26,28H,3,6-11,14-18H2,1-2,4-5H3/b22-12+,23-13+/t21?,24-,25?,26?,27?/m1/s1. IUPAC Standard InChIKey: QYSXJUFSXHHAJI-SMGPGMQOSA-N.