Is 7-Dehydrocholesterol a molecule?

Is 7-Dehydrocholesterol a molecule?

7-Dehydrocholesterol (7-DHC) is a zoosterol that functions in the serum as a cholesterol precursor, and is photochemically converted to vitamin D3 in the skin, therefore functioning as provitamin-D3….7-Dehydrocholesterol.

Names
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Properties
Chemical formula C27H44O
Molar mass 384.638

What type of molecule is 7-Dehydrocholesterol?

7-Dehydrocholesterol is found in abundant quantities in the epidermis probably as a side-reaction product from the cholesterol-forming system (Kandutch, 1964). This Δ5,7-unsaturated sterol is found in unprecedented amounts in the epidermis probably because it is a precursor of vitamin D (Holick, 1985).

Which vitamin has Dehydrocholesterol and which is the source?

Vitamin D. Cholesterol is synthesized to 7-dehydrocholesterol, which in turn is metabolized in the skin to vitamin D3 (Fig.

What does Dehydrocholesterol mean?

Definition of dehydrocholesterol : a crystalline steroid alcohol C27H43OH that occurs chiefly in higher animals and humans (as in the skin), that is made synthetically from cholesterol, and that yields vitamin D3 on irradiation with ultraviolet light.

How is 7-dehydrocholesterol formed?

In the skin, there is 7-dehydrocholesterol (also called “provitamin D3”) in the epidermis and the dermis, which reacts, when UVB radiation in the wavelength range of 280–315 nm passes through these skin layers, to form previtamin D3.

What is the function of Dehydrocholesterol?

7-dehydrocholesterol present in the skin is the basic raw material for the synthesis of vitamin D. 7-dehydrocholesterol is broken down to produce the pre-D isomers upon exposure to ultraviolet light B. The pre-D isomers, in non-catalytic process, get rapidly converted to vitamin D3 (Cholecalciferol).

How is 7-dehydrocholesterol converted into its biologically active form?

What B vitamin is needed for the formation of 7-dehydrocholesterol?

2 Vitamin D3 Synthesis in Skin In the skin, there is 7-dehydrocholesterol (also called “provitamin D3”) in the epidermis and the dermis, which reacts, when UVB radiation in the wavelength range of 280–315 nm passes through these skin layers, to form previtamin D3.

How is 7-dehydrocholesterol produced?

The principal provitamin found in animal tissues is 7-dehydrocholesterol, which is synthesized in the skin [emphasis by us]. Exposure of the skin to sunlight converts 7-dehydrocholesterol to cho- lecalciferol (vitamin D3) [y].