منابع مشابه
The biosynthesis of sterols in higher plants.
1. [2-(14)C]Mevalonate was incorporated into squalene and the major phytosterols of pea and maize leaves; it was also incorporated into compounds belonging to the 4,4-dimethyl and 4alpha-methyl steroid groups and which may be possible phytosterol intermediates. 2. l-[Me-(14)C]Methionine was incorporated into the major sterols and also into the 4,4-dimethyl and 4alpha-methyl steroid groups. No r...
متن کاملBiosynthesis of Cholesterol and Other Sterols
4.5. C24-Alkylation Reduction Bifurcation in Phytosterol Synthesis 6433 5. Sterol Enzyme Action 6434 5.1. C24 Methylation 6434 5.2. C24-Reduction 6438 5.3. Removal of Nuclear Methyl Groups at C4 6439 5.4. Removal of Nuclear Methyl Group at C14 6441 5.5. Shift of Δ to Δ-Position 6442 5.6. 9β,19-Cyclopropane Ring Opening 6444 5.7. C22 Desaturation 6444 6. Concluding Remarks 6445 Author Informatio...
متن کاملBIOSYNTHESIS OF YEAST STEROLS by JAN
approved Major Professor An enzyme system from cell -free yeast homogenates mediating the transfer of the methyl group from Sadenosylmethioninemethyl -C14 or methionine -methyl -C14 to C -28 of ergosterol has been studied. The effects of divalent cations, suithydryl inhibitors and reducing substances on the activity of the enzyme system have been investigated. It was established that for maxima...
متن کاملPlant Sterols and Sterolins Monograph
Alternative Medicine Review ◆ Volume 6, Number 2 ◆ 2001 Page 203 Plant Sterols and Sterolins Introduction Sterols and sterolins, also known as phytosterols, are fats present in all plants, including fruits and vegetables. Although they are chemically similar to the animal fat, cholesterol, they have been shown to exert significant unique biochemical effects in both animals and humans. Because t...
متن کاملThe biosynthesis, absorption, and origin of cholesterol and plant sterols in the Florida land crab.
In order to study the biosynthesis, composition, and origin of sterols in the Florida land crabs, Cardisoma guanhumi (Latreille), we fed 17 male crabs either a cholesterol-free or a high cholesterol diet for 2 to 7 weeks. The origin of sterols in these crabs, whether from biosynthesis or from the diet, was determined by tahree procedures: the incorporation of isotopic mevalonate into the choles...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1969
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(17)36441-4