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18 Cards in this Set
- Front
- Back
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How is vitamin A created?
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B-Carotene breaks down in liver using an enzyme.
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How does vitamin A play a role in vision?
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Attaches to opsin, which is in cone cells of retina responsible for vision in bright light and color vision
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What is another name for Vitamin A
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Retinol
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How does vitamin A react with opsin
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1)Retinol oxidized to 11-trans-Retinal using Retinol dehydrogenase enzyme. 2) 11-trans-Retinal converted to 11-cis Retinal
3) Reacts with epislon part of lysiene (in opsin) ccreates rhodospin |
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How is vitamin D3 created?
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Ultra violet from sun reacts with cholestrol
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What is another name for vitamin D3?
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Cholecalciferol
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What does Vitamin D3 do?
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increases synthesis of Ca2+-binding protien, increases absorption of calcium in intestines. Deficency causes rickets, bones of children become soft, resulting in skeletal deformities.
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What does Vitamin E do?
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antioxidant. Reducing agent (attacks oxidating agents). Protects molecules from degradation. Removes free radicals.
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What does Vitamin K do?
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Regulatory function in blood clotting. (modifies prothrombin).
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Describe the modification of Prothrombin?
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carbon dioxide attaches to Prothrombin creating modified prothrombin (second carboxylic acid group). Calcium attaches created gamma-Carboxyglutamate.
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Beta-Carotene
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Rhodospin
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Vitamin A
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Isoprene
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Vitamin E
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Vitamin K
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What is another name for vitamin D3
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Cholecalciferol
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Vitamin D3
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