Results 171 to 180 of about 10,853 (215)
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Phytoene production in Phycomyces
Archives of Biochemistry and Biophysics, 1957Summary The effects of streptomycin and methylheptenone on phytoene production in Phycomyces blakesleeanus have been studied. It is shown that methylheptenone acts as a powerful stimulant of phytoene production. The magnitude of the accumulation is comparable with that of β -caro-tene by β -ionone.
T, NAKAYAMA +3 more
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Isolation and properties of phytoene
Archives of Biochemistry and Biophysics, 1954Abstract Phytoene, a new noncrystalline, colorless polyene, has been isolated from tomatoes and carrot oil by an improved adsorptive procedure. It was adsorbed less strongly than the known carotenes and polyenes on magnesia and alumina. It produced a very weak Carr-Price reaction, but it did give a characteristic color reaction with the Liebermann ...
W J, RABOURN +2 more
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Food Chemistry, 2011
Momordica charantia, a tropical plant, produces a fruit that has a β-carotene concentration five times higher than that of carrot. To elucidate the molecular basis of β-carotene accumulation in M. charantia, the gene expression levels of phytoene synthase (McPSY) and phytoene desaturase (McPDS) were determined.
Pham Anh Tuan +2 more
exaly +3 more sources
Momordica charantia, a tropical plant, produces a fruit that has a β-carotene concentration five times higher than that of carrot. To elucidate the molecular basis of β-carotene accumulation in M. charantia, the gene expression levels of phytoene synthase (McPSY) and phytoene desaturase (McPDS) were determined.
Pham Anh Tuan +2 more
exaly +3 more sources
Bioresource Technology, 2017
The aim of this work was to study the accumulation of phytoene in Dunaliella salina V-101 by down-regulating its phytoene desaturase (PDS) gene expression using RNA interference and Antisense technology. RNAi and antisense constructs were introduced into the Dunaliella cells by Agrobacterium-mediated transformation.
Ramachandran Srinivasan +2 more
exaly +3 more sources
The aim of this work was to study the accumulation of phytoene in Dunaliella salina V-101 by down-regulating its phytoene desaturase (PDS) gene expression using RNA interference and Antisense technology. RNAi and antisense constructs were introduced into the Dunaliella cells by Agrobacterium-mediated transformation.
Ramachandran Srinivasan +2 more
exaly +3 more sources
Journal of Agricultural and Food ChemistryPhytoene, a colorless carotenoid with unique ultraviolet (UV)-B absorption properties, offers potential for applications in functional food, cosmetics, and therapeutics. However, their low natural yield poses a challenge for large-scale production.
Seungwoo Cha, Ji-Sook Hahn
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The occurrence of phytoene in various plant materials
Archives of Biochemistry and Biophysics, 1953Abstract A method of assay for phytoene in plant materials is presented which involves isooctane-ethanol extraction, adsorption of the interfering substances on a magnesia-Super Cel column, and absorptimetric determination of phytoene at 286 mμ. Twenty plant materials were analyzed for phytoene by this method.
W J, RABOURN, F W, QUACKENBUSH
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The stereochemistry of phytoene biosynthesis
Proceedings of the Royal Society of London. Series B. Biological Sciences, 1966Abstract Experiments with carrot root preparations have demonstrated that all the eliminations of hydrogen at C-4 of mevalonic acid during its conversion into phytoene have the same stereospecificity; the 4-R hydrogen is retained and the 4Shydrogen is eliminated.
Trevor Walworth Goodwin +1 more
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Biochemistry, 2003
Phytoene synthase (PSase) catalyzes the condensation of two molecules of geranylgeranyl diphosphate (GGPP) to give prephytoene diphosphate (PPPP) and the subsequent rearrangement of the cyclopropylcarbinyl intermediate to phytoene. These reactions constitute the first pathway specific step in carotenoid biosynthesis.
Dirk, Iwata-Reuyl +3 more
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Phytoene synthase (PSase) catalyzes the condensation of two molecules of geranylgeranyl diphosphate (GGPP) to give prephytoene diphosphate (PPPP) and the subsequent rearrangement of the cyclopropylcarbinyl intermediate to phytoene. These reactions constitute the first pathway specific step in carotenoid biosynthesis.
Dirk, Iwata-Reuyl +3 more
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Evidence for phytoene in euglena mutants
Plant Science Letters, 1974Abstract The hydrocarbon carotene fractions of several non-photosynthetic mutants of Euglena gracilis var. bacillaris and of Astasia longa were examined. Evidence for the presence of phytoene, the presumed precursor of all C-40 carotenoids, is reported from 3 mutants, SM-L1, PBZ-G3 and HB-G, which synthesize unsaturated C-40 polyenes; they also
J.A. Gross, Richard J. Stroz
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Biochemical and Biophysical Research Communications, 2004
Carotenoids have been recognized as chemopreventive agents against human diseases, such as cancer and cardiovascular disease. Mammalians utilize carotenoids supplied from their food since they are unable to perform the de novo synthesis of carotenoids.
Yoshiko, Satomi +3 more
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Carotenoids have been recognized as chemopreventive agents against human diseases, such as cancer and cardiovascular disease. Mammalians utilize carotenoids supplied from their food since they are unable to perform the de novo synthesis of carotenoids.
Yoshiko, Satomi +3 more
openaire +2 more sources