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  2. β-Carotene - Wikipedia

    en.wikipedia.org/wiki/Β-Carotene

    The conversion process consists of one molecule of β-carotene cleaved by the enzyme beta-carotene 15,15'-dioxygenase, which is encoded by the BCO1 gene, into two molecules of retinal. When plasma retinol is in the normal range the gene expression for SCARB1 and BCO1 are suppressed, creating a feedback loop that suppresses absorption and ...

  3. Vitamin A - Wikipedia

    en.wikipedia.org/wiki/Vitamin_A

    Vitamin A biosynthesis from β-carotene. In most animal species, retinol is synthesized from the breakdown of the plant-formed provitamin, β-carotene. First, the enzyme beta-carotene 15,15'-dioxygenase (BCO-1) cleaves β-carotene at the central double bond, creating an epoxide. This epoxide is then attacked by water creating two hydroxyl ...

  4. Retinol - Wikipedia

    en.wikipedia.org/wiki/Retinol

    Retinol, also called vitamin A 1, is a fat-soluble vitamin in the vitamin A family that is found in food and used as a dietary supplement. [3] Retinol or other forms of vitamin A are needed for vision, cellular development, maintenance of skin and mucous membranes, immune function and reproductive development. [3]

  5. Carotene - Wikipedia

    en.wikipedia.org/wiki/Carotene

    The α-carotene molecule has a β-ring at one end; the other end is called an ε-ring. There is no such thing as an "α-ring". These and similar names for the ends of the carotenoid molecules form the basis of a systematic naming scheme, according to which: α-carotene is β,ε-carotene; β-carotene is β,β-carotene;

  6. What’s the Difference Between Retinols vs Retinoids?

    www.aol.com/difference-between-retinols-vs...

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  7. Retinal - Wikipedia

    en.wikipedia.org/wiki/Retinal

    catalyzed by a beta-carotene 15,15'-monooxygenase [8] or a beta-carotene 15,15'-dioxygenase. [9] Just as carotenoids are the precursors of retinal, retinal is the precursor of the other forms of vitamin A. Retinal is interconvertible with retinol, the transport and storage form of vitamin A:

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