| 单词 |
lumisterol |
| 释义 |
lumisterol Biochem.|l(j)uːˈmɪstərɒl|
[ad. G. lumisterin (A. Luttringhaus 1931, in Chemikerzeitung 12 Dec. 956/2), f. L. lūmi(n-, lūmen light + -sterin after cholesterin, ergosterin, with altered ending (see -sterol).]
A steroid alcohol, C28H44O, which is a stereo-isomer of ergosterol and occurs as an intermediate when this is converted to vitamin D2 by ultra-violet irradiation and warming.
1932Nature 20 Feb. 277/1 In lumisterol the crystals are fine needles with b as needle axis. 1949W. H. Eddy Vitaminology iii. 46 Lumisterol can be converted into calciferol and may form with it an addition compound consisting of one part lumisterol and one part calciferol... This addition compound..was called vitamin D1. 1967W. R. Butt Hormone Chem. xi. 235 It has been established that acetate is the primary carbon source of cholesterol, there being probably about thirty separate reactions involved in the pathway through squalene and lumisterol to cholesterol. 1970R. A. Morton Fat-Soluble Vitamins 187 The compound originally called vitamin D1 was later found to be a mixture of ergocalciferol (D2) and lumisterol, a photodecomposition product of D2. |
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