Fat Soluble Vitamins, vitamin a, retinal and visual pigmentation, carotenoids

Fat Soluble Vitamins, vitamin a, retinal and visual pigmentation, carotenoids

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Fat Soluble Vitamins Vitamin A - retinol o involved in transport and storage (binds to transport protein then storage protein) o 90% Vit A is retinol o 2 nd active form is retinal and involved in vision. .part of visual pigment o Retinoic acid Cell development (cell differentiation). .cells of the lining of body particularly skin cells (lining cells- epithelial cells), mucous membranes. Growth- bone elongation. .osteoblast- put minerals on bone to help it grow. .osteoclass: take off bone Involved in embryonic development Involved in immunity In the body retinol can be converted to retinal and it is a reversible reaction…retinal makes retinoic acid Retinal and Visual Pigment - visual pigment is a combination of opsin which is a protein and Vit A (Retinal)
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Unformatted text preview: -when light hits the pigment it changes form from cyst to trans form. (changes shape)-goes back into trans form.some of retinal is destroyed.-Rhodopsin? Carotenoids- group of chemicals, some are converted to Vit A and some are powerful Anti oxidants.-precursor to Vit A o Beta carotene and alpha carotene o Beta cyptoxanthin-Antioxidants o Beta carotene and alpha carotene o Beta cryptoxanthin o Lycopene o Lutein and zeazanthin Vitamin A Sources Retinol comes from ANIMAL SOURCES-liver-fish-milk products-butter-eggs Carotenoids-dark green veggies-red/orange veggies-red/ orange fruits...
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Fat Soluble Vitamins, vitamin a, retinal and visual pigmentation, carotenoids

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