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Retinyl palmitate, or vitamin A palmitate, is the ester of retinol and palmitic acid, with formula C 36 H 60 O 2. It is the most abundant form of vitamin A storage in animals. [2] An alternate spelling, retinol palmitate, which violates the -yl organic chemical naming convention for esters, is also frequently seen.
Short title: 2007 Guideline for Isolation Precautions: Author: CDC: Date and time of digitizing: 03:51, 13 May 2009: Software used: PScript5.dll Version 5.2.2
The primary dietary form is retinol, which may have a fatty acid molecule attached, creating a retinyl ester, when stored in the liver. Retinol – the transport and storage form of vitamin A – is interconvertible with retinal, catalyzed to retinal by retinol dehydrogenases and back to retinol by retinaldehyde reductases.
[12] All classes of retinoid bind to many proteins. Natural retinoids such as retinol and retinyl esters bind to carrier proteins such as RBP4, chylomicrons and VLDL while synthetic retinoids likely bind to these and other proteins. [17] First generation retinoids are rapidly metabolized by Cytochrome p450 enzymes, typically of the Cyp26 family ...
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Retinal pigment epithelium-specific 65 kDa protein (also known as RPE65) is a retinoid isomerohydrolase enzyme of the vertebrate visual cycle. [5] [6] RPE65 is expressed in the retinal pigment epithelium (RPE, a layer of epithelial cells that nourish the photoreceptor cells) and is responsible for the conversion of all-trans-retinyl esters to 11-cis-retinol during phototransduction.
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