Previtamin D3: Difference between revisions
Previtamin D3
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{{DISPLAYTITLE:Previtamin D<sub>3</sub>}} | {{DISPLAYTITLE:Previtamin D<sub>3</sub>}} | ||
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'''Previtamin D<sub>3</sub>''' is an intermediate in the production of [[cholecalciferol]] ([[vitamin D]]<sub>3</sub>). | '''Previtamin D<sub>3</sub>''' is an intermediate in the production of [[cholecalciferol]] ([[vitamin D]]<sub>3</sub>). | ||
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It is formed by the action of [[UV light]], most specifically UVB light of wavelengths between 295 and 300 nm, acting on [[7-dehydrocholesterol]] in the [[epidermis_(skin)|epidermal layers]] of the skin. | It is formed by the action of [[UV light]], most specifically UVB light of wavelengths between 295 and 300 nm, acting on [[7-dehydrocholesterol]] in the [[epidermis_(skin)|epidermal layers]] of the skin. | ||
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The B ring of the [[steroid]] nucleus structure is broken open, making a [[secosteroid]]. This then undergoes spontaneous [[isomerization]] into cholecalciferol, the [[prohormone]] of the active form of vitamin D, [[calcitriol]]. | The B ring of the [[steroid]] nucleus structure is broken open, making a [[secosteroid]]. This then undergoes spontaneous [[isomerization]] into cholecalciferol, the [[prohormone]] of the active form of vitamin D, [[calcitriol]]. | ||
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The synthesis of previtamin D<sub>3</sub> is blocked effectively by [[sunscreens]]. | The synthesis of previtamin D<sub>3</sub> is blocked effectively by [[sunscreens]]. | ||
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== Interactive pathway map== | == Interactive pathway map== | ||
{{VitaminDSynthesis_WP1531|highlight=Previtamin_D3}} | {{VitaminDSynthesis_WP1531|highlight=Previtamin_D3}} | ||
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{{Vitamin}} | {{Vitamin}} | ||
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{{二次利用|date=20 November 2023}} | {{二次利用|date=20 November 2023}} | ||
[[Category:Vitamin D]] | [[Category:Vitamin D]] | ||