lumisterol


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lumisterol

(luːˈmɪstəˌrɒl)
n
(Biochemistry) biochem a steroid compound produced when ergosterol is exposed to ultraviolet radiation. Formula: C28H44O
[C20: from Latin lumin-, lūmen light + sterol]
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Moreover excess of UVB rays also transform previtamin [D.sub.3] into biologically inactive metabolites, tachysterol and lumisterol. On the other hand, the other precursor vitamin [D.sub.2] is plant derived and its source is through diet.
However, prolonged exposure to sunlight does not produce toxic amounts of vitamin [D.sub.3] because of the pre-[D.sub.3] conversion to the biologically inactive compounds called lumisterol and tachysterol [6].
Vitamin D1, molecular compound of ergocalciferol with lumisterol. Vitamin D2, ergocalciferol (made from ergosterol).