dehydrocholesterol
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dehydrocholesterol
[dē¦hī·drō·kə′les·tə‚rȯl] (biochemistry)
C27H43OH A provitamin of animal origin found in the skin of humans, in milk, and elsewhere, which upon irradiation with ultraviolet rays becomes vitamin D.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
Vitamin D can be synthesized in the skin from a precursor, 7
dehydrocholesterol after exposure to ultraviolet light or can be consumed in the diet.
McNeill, "Photometabolism of 7
dehydrocholesterol to previtamin [D.sub.3] in skin," Biochemical and Biophysical Research Communications, vol.
Vitamin Dis photosynthesized in the skin of vertebrates by the action of solar ultraviolet (UV) B radiation on 7-3
dehydrocholesterol [9].
Hydroxylation of 7, 8
dehydrocholesterol to 25(OH) [D.sub.3] in the liver and subsequently to 1, 25 [(OH).sub.2] [D.sub.3] in the proximal tubular cells of the kidneys, and several other vitamin D responsive organ systems are well known facts of vitamin D physiology.
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